Journal of Clinical and Diagnostic Research, ISSN - 0973 - 709X

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On Sep 2018




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On Sep 2018




Dr. Kalyani R

"Journal of Clinical and Diagnostic Research is at present a well-known Indian originated scientific journal which started with a humble beginning. I have been associated with this journal since many years. I appreciate the Editor, Dr. Hemant Jain, for his constant effort in bringing up this journal to the present status right from the scratch. The journal is multidisciplinary. It encourages in publishing the scientific articles from postgraduates and also the beginners who start their career. At the same time the journal also caters for the high quality articles from specialty and super-specialty researchers. Hence it provides a platform for the scientist and researchers to publish. The other aspect of it is, the readers get the information regarding the most recent developments in science which can be used for teaching, research, treating patients and to some extent take preventive measures against certain diseases. The journal is contributing immensely to the society at national and international level."



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Sri Devaraj Urs Academy of Higher Education and Research , Kolar, Karnataka
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Professor and Head
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Saraswati Dental College
Lucknow
On Sep 2018




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Calcutta National Medical College & Hospital , Kolkata




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Muzaffarnagar Medical College,
Muzaffarnagar.
On Aug 2018




Dr. Arundhathi. S
"Journal of Clinical and Diagnostic Research (JCDR) is a reputed peer reviewed journal and is constantly involved in publishing high quality research articles related to medicine. Its been a great pleasure to be associated with this esteemed journal as a reviewer and as an author for a couple of years. The editorial board consists of many dedicated and reputed experts as its members and they are doing an appreciable work in guiding budding researchers. JCDR is doing a commendable job in scientific research by promoting excellent quality research & review articles and case reports & series. The reviewers provide appropriate suggestions that improve the quality of articles. I strongly recommend my fraternity to encourage JCDR by contributing their valuable research work in this widely accepted, user friendly journal. I hope my collaboration with JCDR will continue for a long time".



Dr. Arundhathi. S
MBBS, MD (Pathology),
Sanjay Gandhi institute of trauma and orthopedics,
Bengaluru.
On Aug 2018




Dr. Mamta Gupta,
"It gives me great pleasure to be associated with JCDR, since last 2-3 years. Since then I have authored, co-authored and reviewed about 25 articles in JCDR. I thank JCDR for giving me an opportunity to improve my own skills as an author and a reviewer.
It 's a multispecialty journal, publishing high quality articles. It gives a platform to the authors to publish their research work which can be available for everyone across the globe to read. The best thing about JCDR is that the full articles of all medical specialties are available as pdf/html for reading free of cost or without institutional subscription, which is not there for other journals. For those who have problem in writing manuscript or do statistical work, JCDR comes for their rescue.
The journal has a monthly publication and the articles are published quite fast. In time compared to other journals. The on-line first publication is also a great advantage and facility to review one's own articles before going to print. The response to any query and permission if required, is quite fast; this is quite commendable. I have a very good experience about seeking quick permission for quoting a photograph (Fig.) from a JCDR article for my chapter authored in an E book. I never thought it would be so easy. No hassles.
Reviewing articles is no less a pain staking process and requires in depth perception, knowledge about the topic for review. It requires time and concentration, yet I enjoy doing it. The JCDR website especially for the reviewers is quite user friendly. My suggestions for improving the journal is, more strict review process, so that only high quality articles are published. I find a a good number of articles in Obst. Gynae, hence, a new journal for this specialty titled JCDR-OG can be started. May be a bimonthly or quarterly publication to begin with. Only selected articles should find a place in it.
An yearly reward for the best article authored can also incentivize the authors. Though the process of finding the best article will be not be very easy. I do not know how reviewing process can be improved. If an article is being reviewed by two reviewers, then opinion of one can be communicated to the other or the final opinion of the editor can be communicated to the reviewer if requested for. This will help one’s reviewing skills.
My best wishes to Dr. Hemant Jain and all the editorial staff of JCDR for their untiring efforts to bring out this journal. I strongly recommend medical fraternity to publish their valuable research work in this esteemed journal, JCDR".



Dr. Mamta Gupta
Consultant
(Ex HOD Obs &Gynae, Hindu Rao Hospital and associated NDMC Medical College, Delhi)
Aug 2018




Dr. Rajendra Kumar Ghritlaharey

"I wish to thank Dr. Hemant Jain, Editor-in-Chief Journal of Clinical and Diagnostic Research (JCDR), for asking me to write up few words.
Writing is the representation of language in a textual medium i e; into the words and sentences on paper. Quality medical manuscript writing in particular, demands not only a high-quality research, but also requires accurate and concise communication of findings and conclusions, with adherence to particular journal guidelines. In medical field whether working in teaching, private, or in corporate institution, everyone wants to excel in his / her own field and get recognised by making manuscripts publication.


Authors are the souls of any journal, and deserve much respect. To publish a journal manuscripts are needed from authors. Authors have a great responsibility for producing facts of their work in terms of number and results truthfully and an individual honesty is expected from authors in this regards. Both ways its true "No authors-No manuscripts-No journals" and "No journals–No manuscripts–No authors". Reviewing a manuscript is also a very responsible and important task of any peer-reviewed journal and to be taken seriously. It needs knowledge on the subject, sincerity, honesty and determination. Although the process of reviewing a manuscript is a time consuming task butit is expected to give one's best remarks within the time frame of the journal.
Salient features of the JCDR: It is a biomedical, multidisciplinary (including all medical and dental specialities), e-journal, with wide scope and extensive author support. At the same time, a free text of manuscript is available in HTML and PDF format. There is fast growing authorship and readership with JCDR as this can be judged by the number of articles published in it i e; in Feb 2007 of its first issue, it contained 5 articles only, and now in its recent volume published in April 2011, it contained 67 manuscripts. This e-journal is fulfilling the commitments and objectives sincerely, (as stated by Editor-in-chief in his preface to first edition) i e; to encourage physicians through the internet, especially from the developing countries who witness a spectrum of disease and acquire a wealth of knowledge to publish their experiences to benefit the medical community in patients care. I also feel that many of us have work of substance, newer ideas, adequate clinical materials but poor in medical writing and hesitation to submit the work and need help. JCDR provides authors help in this regards.
Timely publication of journal: Publication of manuscripts and bringing out the issue in time is one of the positive aspects of JCDR and is possible with strong support team in terms of peer reviewers, proof reading, language check, computer operators, etc. This is one of the great reasons for authors to submit their work with JCDR. Another best part of JCDR is "Online first Publications" facilities available for the authors. This facility not only provides the prompt publications of the manuscripts but at the same time also early availability of the manuscripts for the readers.
Indexation and online availability: Indexation transforms the journal in some sense from its local ownership to the worldwide professional community and to the public.JCDR is indexed with Embase & EMbiology, Google Scholar, Index Copernicus, Chemical Abstracts Service, Journal seek Database, Indian Science Abstracts, to name few of them. Manuscriptspublished in JCDR are available on major search engines ie; google, yahoo, msn.
In the era of fast growing newer technologies, and in computer and internet friendly environment the manuscripts preparation, submission, review, revision, etc and all can be done and checked with a click from all corer of the world, at any time. Of course there is always a scope for improvement in every field and none is perfect. To progress, one needs to identify the areas of one's weakness and to strengthen them.
It is well said that "happy beginning is half done" and it fits perfectly with JCDR. It has grown considerably and I feel it has already grown up from its infancy to adolescence, achieving the status of standard online e-journal form Indian continent since its inception in Feb 2007. This had been made possible due to the efforts and the hard work put in it. The way the JCDR is improving with every new volume, with good quality original manuscripts, makes it a quality journal for readers. I must thank and congratulate Dr Hemant Jain, Editor-in-Chief JCDR and his team for their sincere efforts, dedication, and determination for making JCDR a fast growing journal.
Every one of us: authors, reviewers, editors, and publisher are responsible for enhancing the stature of the journal. I wish for a great success for JCDR."



Thanking you
With sincere regards
Dr. Rajendra Kumar Ghritlaharey, M.S., M. Ch., FAIS
Associate Professor,
Department of Paediatric Surgery, Gandhi Medical College & Associated
Kamla Nehru & Hamidia Hospitals Bhopal, Madhya Pradesh 462 001 (India)
E-mail: drrajendrak1@rediffmail.com
On May 11,2011




Dr. Shankar P.R.

"On looking back through my Gmail archives after being requested by the journal to write a short editorial about my experiences of publishing with the Journal of Clinical and Diagnostic Research (JCDR), I came across an e-mail from Dr. Hemant Jain, Editor, in March 2007, which introduced the new electronic journal. The main features of the journal which were outlined in the e-mail were extensive author support, cash rewards, the peer review process, and other salient features of the journal.
Over a span of over four years, we (I and my colleagues) have published around 25 articles in the journal. In this editorial, I plan to briefly discuss my experiences of publishing with JCDR and the strengths of the journal and to finally address the areas for improvement.
My experiences of publishing with JCDR: Overall, my experiences of publishing withJCDR have been positive. The best point about the journal is that it responds to queries from the author. This may seem to be simple and not too much to ask for, but unfortunately, many journals in the subcontinent and from many developing countries do not respond or they respond with a long delay to the queries from the authors 1. The reasons could be many, including lack of optimal secretarial and other support. Another problem with many journals is the slowness of the review process. Editorial processing and peer review can take anywhere between a year to two years with some journals. Also, some journals do not keep the contributors informed about the progress of the review process. Due to the long review process, the articles can lose their relevance and topicality. A major benefit with JCDR is the timeliness and promptness of its response. In Dr Jain's e-mail which was sent to me in 2007, before the introduction of the Pre-publishing system, he had stated that he had received my submission and that he would get back to me within seven days and he did!
Most of the manuscripts are published within 3 to 4 months of their submission if they are found to be suitable after the review process. JCDR is published bimonthly and the accepted articles were usually published in the next issue. Recently, due to the increased volume of the submissions, the review process has become slower and it ?? Section can take from 4 to 6 months for the articles to be reviewed. The journal has an extensive author support system and it has recently introduced a paid expedited review process. The journal also mentions the average time for processing the manuscript under different submission systems - regular submission and expedited review.
Strengths of the journal: The journal has an online first facility in which the accepted manuscripts may be published on the website before being included in a regular issue of the journal. This cuts down the time between their acceptance and the publication. The journal is indexed in many databases, though not in PubMed. The editorial board should now take steps to index the journal in PubMed. The journal has a system of notifying readers through e-mail when a new issue is released. Also, the articles are available in both the HTML and the PDF formats. I especially like the new and colorful page format of the journal. Also, the access statistics of the articles are available. The prepublication and the manuscript tracking system are also helpful for the authors.
Areas for improvement: In certain cases, I felt that the peer review process of the manuscripts was not up to international standards and that it should be strengthened. Also, the number of manuscripts in an issue is high and it may be difficult for readers to go through all of them. The journal can consider tightening of the peer review process and increasing the quality standards for the acceptance of the manuscripts. I faced occasional problems with the online manuscript submission (Pre-publishing) system, which have to be addressed.
Overall, the publishing process with JCDR has been smooth, quick and relatively hassle free and I can recommend other authors to consider the journal as an outlet for their work."



Dr. P. Ravi Shankar
KIST Medical College, P.O. Box 14142, Kathmandu, Nepal.
E-mail: ravi.dr.shankar@gmail.com
On April 2011
Anuradha

Dear team JCDR, I would like to thank you for the very professional and polite service provided by everyone at JCDR. While i have been in the field of writing and editing for sometime, this has been my first attempt in publishing a scientific paper.Thank you for hand-holding me through the process.


Dr. Anuradha
E-mail: anuradha2nittur@gmail.com
On Jan 2020

Important Notice

Original article / research
Year : 2021 | Month : August | Volume : 15 | Issue : 8 | Page : CC01 - CC05 Full Version

Assessing the Relationship between Digit Ratio as a Marker for Prenatal Androgen Exposure and Different Blood Pressure Components among North Indian Males: A Pilot Study


Published: August 1, 2021 | DOI: https://doi.org/10.7860/JCDR/2021/50559.15191
Arjun Maitra, Vinita Ailani, Nitin Srivastava, Sajjan Lal Verma

1. PhD Scholar, NIMS University Jaipur, Rajasthan, India; Assistant Professor, Department of Physiology, Mayo Institute of Medical Sciences, Barabanki, Uttar Pradesh, India. 2. Professor, Department of Physiology, National Institute of Medical Sciences and Research, NIMS University, Jaipur, Rajasthan, India. 3. Assistant Professor, Department of General Medicine, Mayo Institute of Medical Sciences, Barabanki, Uttar Pradesh, India. 4. Professor, Department of Physiology, Mayo Institute of Medical Sciences, Barabanki, Uttar Pradesh, India.

Correspondence Address :
Dr. Arjun Maitra,
Assistant Professor, Department of Physiology, Mayo Institute of Medical Sciences, Faizabad Road, Gadia, Barabanki-225001, Uttar Pradesh, India.
E-mail: arjunmaitra@gmail.com

Abstract

Introduction: Digit ratio (2D:4D) has been associated with cardiovascular diseases using association with surrogate markers. Studies showing an association of digit ratio with cardiovascular parameters within normal limits are scarce.

Aim: To explore the relation between different blood pressure components and digit ratio in normal young males within physiological range.

Materials and Methods: In this cross-sectional pilot study, 25 apparently healthy male volunteers were included. Digit ratio (2D:4D) was measured. Body Mass Index (BMI) was estimated. Peripheral blood pressure, central aortic blood pressure and all four limb blood pressures were measured using periscope arterial health and cardiovascular analysis system. Blood pressure was measured using oscillometric method from all peripheral sites and estimated central aortic pressure by a validated transfer function. Pearson’s correlation studies were performed to assess any preliminary association. Two groups were formed of low and high digit ratio and Student’s t-test was performed to assess any significant difference between the groups.

Results: Digit ratio of both hands correlated best with peripheral Diastolic Blood Pressure (DBP) (Right 2D:4D r=0.43, p<0.05/Left 2D:4D r=0.40, p<0.05). No significant association observed for peripheral systolic pressure (p>0.05) and digit ratio of both hands. Significant association observed for all four limb blood pressure components and digit ratio. Pulse pressure components did not show any association with digit ratio. Significant difference of blood pressure components was observed when low and high digit ratio groups were compared. It was observed that blood pressure components were on higher side within the normal limits among the subjects with high digit ratio.

Conclusion: Preliminary observations from this pilot study suggests that in normal young adult males digit ratio associate positively with different blood pressure components in normotensive males and has the potential to be used as a potent marker for early changes in cardiovascular diseases.

Keywords

Ankle blood pressure, Aortic blood pressure, Cardiovascular disease, Finger length ratio

Digit ratio (2D:4D) research is continuing its journey from early till date. Initially, it was speculated to be a marker for prenatal androgen exposure (1) and later confirmed by empirical research (2). Digit ratio or Finger length ratio or 2D:4D ratio is the ratio of length of the index finger (2D) and Ring finger (4D) from the proximal ridge to the tip of the finger measured from palmer aspect (3). This anthropometric measurement is not fixed and varies across the ethnicity (4). The common observation throughout the ethnicity reveals it is sexually dimorphic and males tend to have lower ratio than the females (5),(6). Digit ratio has been found to have association with many physiological and psychological parameters (1). Masculinity (7), Running ability, Soccer ability (8), Running speed (1), Myocardial infarction (1),(9), Hypertension (10), Coronary artery disease (11),(12). Studies observing relationship with hypertension and body composition indicators are also reported from India (10),(13). Association with different surrogate anthropological markers for cardiovascular diseases such as neck circumference (14), waist to hip ratio (13), BMI (15) and digit ratio was also reported. Several observations reported that digit ratio has a positive association with hypertension (10),(16) and thus may be used as a possible marker for predisposition to coronary heart disease. Data regarding the association of digit ratio in relation to four limb blood pressure and aortic pressure in normotensive population is not available. Hence, the present study explores the relation between different blood pressure components and digit ratio in normal young males within physiological range.

Material and Methods

This cross-sectional pilot study was conducted in the Department of Physiology, Mayo Institute of Medical Sciences, Barabanki, Uttar Pradesh, India. Study was planned during May 2019 and conducted between December 2019 to March 2020, for four months as a pilot study. Study was approved by the Institutional Ethics Committee vide approval letter no. MIMS/Ex/2019/198 dated 19/11/19 and written informed consent was obtained from all participants.

Sample size calculation: For the calculation of sample size, the formula based on prevalence was used for the original study,


n={t2×p(1-p)} / m2

where, n=Sample Size, t=confidence level at 95%, p=estimated prevalence 14% (17), m=margin of error. For the actual study, the sample size was found to be 230 including the margin of dropouts and incomplete investigations. Twenty five male subjects aged between 18-40 years were included, which was not less than 10% of the actual sample size fulfilling the criteria for sample size of pilot study (18).

Volunteered subjects were screened at Out Patient Department (OPD) of Department of General Medicine, Mayo Institute of Medical Sciences as per study protocol. During the period of the study no female candidate reported and left authors devoid of any choice but to report the data exclusive to males.

Inclusion criteria: Subjects between the age 18-40 years who were clinically normal and not suffering from hypertension, diabetes, any endocrine disorder, any cardiovascular diseases any kind of restrictive or obstructive disease of lung, present history of liver disease, viral myositis, and other muscular diseases were included in the study.

Exclusion criteria: Subjects aged <18 years and aged >40 years, any kind of arthropathy, history of cardiac disease, Hyper/hypothyroidism, diabetes, hypertension, tuberculosis, any kind of restrictive or obstructive disease of lung, present history of liver disease, viral myositis, and other muscular diseases. Female subjects with hormonal disorders including polycystic ovarian disease and adrenal hyperplasia and subjects, who were smoker or using tobacco in any form, were excluded from the study.

BMI Estimation

Height and weight were measured for each subject using standard calibrated stadiometer and BMI was calculated using formula

BMI= m / h2

where m is mass in kgs and h is height in meters.

Digit Ratio Measurement

Length of the 2nd digit (index finger) and 4th digit (ring finger) was measured from the palmer surface. The distance from proximal crease to distal tip was measured to get the length of the digits. Digit ratio was calculated as the ratio of length of index finger to ring finger (2D:4D).

Four limb blood pressure recording, central blood pressure and Ankle Brachial Index (ABI) estimation: Subjects were allowed rest for five minutes in supine condition in ambient room temperature before the recording of different blood pressure components. Dedicated pressure cuffs were tied around both arms (brachium) and both ankles. Electrocardiogram (ECG) standard limb leads were placed as per the manufacturer’s guideline. Demographic details were fed to the software before initiation of the measurement. Simultaneous four limb blood pressure was recorded using periscope arterial health and cardiovascular analysis system by Genesis Medical System Pvt., Ltd., India (19). The instrument calibrates itself before initiating the recording procedure. Central aortic pressures and ABI were measured with dedicated Periscope?SUP?TM #SUP#software (Ver.3.0). Ankle to brachial index is the ratio of ankle systolic pressure to brachial systolic pressure. Subjects were instructed to restrict themselves from use of caffeine products for 24 hours prior to participate in the study.

Statistical Analysis

Data was analysed using Microsoft excel 365 statistical plugin software. Results were expressed as mean and Standard Deviation (SD). Correlation studies (Pearson’s) were performed with data obtained and the significant correlation was considered whenever p<0.05. Independent t-test was performed to analyse any significant difference observed for the high and low digit ratio groups (categorised using a median split). The difference was considered statistically significant whenever p<0.05.

Results

Descriptive statistics for baseline data is described in (Table/Fig 1).

Systolic blood pressure: Correlation studies between right hand digit ratio and Systolic Blood Pressure (SBP) component showed moderate degree of correlation with Peripheral SBP, Aortic SBP and four limbs SBP. Correlations were significant for Left arm SBP (r=0.43, p=0.031), Right Ankle SBP (r=0.40, p=0.044) and Aortic SBP (r=0.42, p=0.035) (Table/Fig 2).

Diastolic blood pressure: Diastolic component of Peripheral, Aortic, and all four limbs blood pressure correlated with Right and Left hand digit ratio except the correlation between Left hand digit ratio and right arm DBP was non significant (r=0.34, p=0.0933). Correlation between ankle DBP components with both hands digit ratio was the strongest among all (Table/Fig 2).

Pulse pressure: No significant association was observed for peripheral, aortic, and all four limbs pulse pressure when correlated with digit ratio of both hands (Table/Fig 2).

Mean arterial pressure: Mean Arterial Pressures (MAP) of all four limb pressure was only studied and found to be correlated significantly with both hands digit ratio except the correlation between left hand digit ratio and right arm MAP (r=0.35, p=0.0860) (Table/Fig 2).

Two groups of low and high digit ratio were made by median split method using the Right Hand Digit Ratio (median=0.963). The t-test results are described in (Table/Fig 3). It was observed that Peripheral SBP was significantly (p=0.02, p<0.05) less in low digit ratio group. Aortic systolic pressure (100.25±7.21mm Hg) was significantly less (p=0.009, p<0.05) in low digit ratio group compared to aortic systolic pressure (110.07±9.78 mmHg) among high digit ratio group. All four limb SBP were found to be significantly low (p<0.05) in low digit ratio group. Peripheral systolic and diastolic pressure was found to significantly low (p<0.05) in the low digit ratio group. Aortic systolic and diastolic pressure found to significantly low (p<0.05) in the low digit ratio group. The same observations were noted for all four limb SBP and DBP. There was no significant difference observed for peripheral, aortic and all four limb pulse pressure between the groups. MAP of all four limbs was found to be significantly low (Table/Fig 3) in low digit ratio group.

Discussion

Hypertension is one of the leading causes of death worldwide and major reason for numerous life-threatening disease conditions. The digit ratio has been associated with cardiovascular diseases by several authors. After conducting an exhaustive search for literature authors declare that in our best knowledge this study probably is the first attempt to observe the relation between digit ratio, aortic blood pressure and all four limbs blood pressure. Present study revealed that systolic pressure component of peripheral blood pressure does not correlate with either hand digit ratio but aortic systolic pressure does correlate significantly with both right and left hand digit ratio.

In 1985, a study by Beevers D reported that systolic and diastolic pressures both can predict mortality in patients but predictive capacity of SBP is more than DBP (20). The present study also observed significant difference in SBP and DBP between the low and high digit ratio groups. Both SBP and DBP were observed to be low in the low digit ratio group. Previous Indian study reported that high digit ratio of both hands is associated with hypertension. Study also showed significant difference of digit ratio between stage-1 and stage-2 hypertension (10). Aortic systolic and diastolic pressures both correlated significantly with the digit ratio of both hands. Aortic systolic pressure and aortic diastolic pressure differed significantly between the groups. It has been observed in several studies that the central aortic blood pressures exhibit higher predictive risk for cardiovascular disease than peripheral brachial artery blood pressure (21),(22). Central aotric SBP is lower than the corresponding Peripheral (Brachial) SBP (21) and a same phenomenon is observable from present study also. The difference was mainly due to the stiffness of arterial tree and pressure wave reflection from peripheral impedance mismatch points (21). Left ventricular pump works against the afterload in the central large arteries (23). Aortic and peripheral pressures differ significantly, and pressure wave amplification is more prominent in young non hypertensive subjects (24). Central aortic BP has been found to be independently associated with subclinical cardiovascular disease in general and disease population (25). So brachial pressure though have a better predicting power to predict cardiovascular outcome, the central pressure reflects the cardiac loading, vascular damage and prognosis (24).

Interesting observation of the present study was no significant correlation was observed between pulse pressure from all the above mentioned recording sites and the digit ratio of both hands. Neither any significant difference of pulse pressure observed between low and high digit ratio groups. Independent predictive power of pulse pressure towards, arterial stiffness or cardiovascular and cerebrovascular events is controversial (26).

Systolic and diastolic pressure is considered as pulsatile component of blood pressure curve whereas MAP is considered as the static component (27). MAP and pulse pressure both are considered to be a useful marker cardiovascular risk. A study showed that MAP is a better predictor of ischemic stroke in a continuous scale than pulse pressure (28). In present study, it was observed that the difference of all four limb MAP was significant for the groups. All four limb mean pressure correlated significantly with right hand digit ratio. Left hand digit ratio did not correlate with right arm mean pressure.

Digit ratio is considered to be the marker for prenatal androgen exposure and found to remain stable throughout the life (29). Digit ratio has been implicated several times with different markers of cardiovascular diseases. Studies have suggested digit ratio as a predictor of metabolic syndrome (15). In North Indian population, hypertension was found to be positively associated with digit ratio (10). It has been observed that right hand digit ratio and the difference of both hand digit ratio (R-L) negatively correlated with age of myocardial infarction but there was no differences observed for finger length ratio in mycardial infarction groups and control group (30). A study suggested that higher 2D:4D ratio is associated with coronary heart disease and breast cancer in female Chinese population (11),(12) and in males though the age of onset correlated with left hand digit ratio (31). Most of the studies have shown relationship with anthropometric variables to link digit ratio and cardiovascular risk disposition.

Digit ratio studies are not without contradiction. Studies have observed that it may not be a correct biomarker for prenatal androgen exposure (32). A recent study found no association between digit ratio and cardiovascular disease in post menopausal women (33). Authors did not use any surrogate markers and tried to explore the physiological relation between normal adult cardiovascular physiology and digit ratio. It has been reported that at least in animal model, exposure to prenatal androgen increase the haemodynamic parameters of heart in male Wistar rats (34). The present pilot study showed a positive association between digit ratio and different blood pressure components of peripheral and aortic blood pressures. It was also observed that within a small population there was a significant difference in different blood pressure components between low and high digit ratio groups where blood pressure components were statistically lower in the low digit ratio group.

Limitation(s)

These observations are made from a very small population and basically to check any possible existence and trends of the association between digit ratio and blood pressure components in normal population. Though the subjects were screened for confounding factors before incorporation in this study, authors admit that the effect of dietary habits on blood pressure was not taken into care. The risk of the cardiovascular disease varies among the ethnicity a multicentric study with different ethnicity will help to generalise the relation across the population. To explore the pathophysiological relation between prenatal androgen and adult cardiac function study of molecular dimension must be undertaken which was not done.

Conclusion

Initial observation from the pilot study suggests a significant positive association digit ratio and blood pressure components within normotensive males. Digit ratio of both hands correlated with systolic and diastolic aortic blood pressure. For systolic component left hand digit ratio had shown significant correlation with right and left ankle, left arm and aortic SBP. For diastolic components right hand digit ratio had shown significant association with all four limbs and aortic DBP. Pulse pressure components did not correlate with either hand digit ratio. MAP of all four limbs correlated with right hand digit ratio. High digit ratio group had significantly more blood pressure for all the pressure components. Thus, it may be assumed that not only in hypertension, but blood pressure in normotensive young adult males also associate positively with the digit ratio and may be considered as a useful tool to study the cardiovascular function and early changes associated with blood pressure beside the commonly present markers.

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DOI and Others

10.7860/JCDR/2021/50559.15191

Date of Submission: May 27, 2021
Date of Peer Review: Jul 08, 2021
Date of Acceptance: Jul 20, 2021
Date of Publishing: Aug 01, 2021

AUTHOR DECLARATION:
• Financial or Other Competing Interests: None
• Was Ethics Committee Approval obtained for this study? Yes
• Was informed consent obtained from the subjects involved in the study? Yes
• For any images presented appropriate consent has been obtained from the subjects. No

PLAGIARISM CHECKING METHODS:
• Plagiarism X-checker: May 28, 2021
• Manual Googling: May 28, 2021
• iThenticate Software: Jul 08, 2021 (7%)

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