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

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On Sep 2018




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On Sep 2018




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"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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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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C.S. Ramesh Babu,
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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.
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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.
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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 : 2022 | Month : November | Volume : 16 | Issue : 11 | Page : OC01 - OC06 Full Version

Correlation of 25-Hydroxy Vitamin D and Serum Lipid Profile amongst Asymptomatic Adults in Mumbai City: A Cross-sectional Study


Published: November 1, 2022 | DOI: https://doi.org/10.7860/JCDR/2022/56822.16988
Anupa Resham Ashok Hinduja, Ashok Asthana, David Dale Chandy, Deepak Patkar, Harshad Wankhedkar

1. Clinical Associate, Department of Internal Medicine, Dr. Balabhai Nanavati, Vile Parle West, Mumbai, Maharashtra, India. 2. Director and Senior Consultant, Department of Internal Medicine, SevenHills Hospital, Mumbai, Maharashtra, India. 3. Head and Senior Consultant, Department of Endocrinology, Sir HN Reliance Hospital, Mumbai, Maharashtra, India. 4. Director and Senior Consultant, Department of Radiology, Dr. Balabhai Nanavati, Mumbai, Maharashtra, India. 5. Consultant, Department of Radiology and Imaging, Nanavati Max Superspeciality Hospital, Mumbai, Maharashtra, India.

Correspondence Address :
Dr. Anupa Resham Ashok Hinduja,
106, Palm View, Opp Akash Building, Sarojini Naidu Road, Mumbai, Maharashtra, India.
E-mail: hinduja.anupa@gmail.com

Abstract

Introduction: Deficiency of 25-Hydroxy Vitamin D (25-OH Vitamin) is prevalent globally. Vitamin D and cholesterol metabolism are known to be linked with each other. Few International studies have attempted to relate low Vitamin D level and altered serum lipid levels. However, Indian studies are lacking, hence there is a need to conduct the studies in Indian population.

Aim: To study the correlation of the serum Vitamin D level with lipid profile amongst asymptomatic Indian adults in a tertiary care hospital, Mumbai, India.

Materials and Methods: This cross-sectional study was conducted in SevenHills Hospital, Mumbai, Maharashtra, India (tertiary care hospital), from December 2016 to August 2017. A total of 243 asymptomatic adults, visiting the wellness clinic for routine assessment of health status were randomly selected. Study participants were divided into two groups based on Vitamin D levels. Group A (n=139) with Vitamin D level <20 ng/mL, group B (n=104) with Vitamin D ≥20 ng/mL. Group B was further segregated into sub group B1 (n=60) with Vitamin D level ≥20 ng/mL to <30 ng/mL and sub group B2 (n=44) with Vitamin D level ≥30 ng/mL. Fasting blood samples were collected to measure levels of serum Vitamin D and lipid profile. The measured values of Vitamin D and serum lipids were statistically analysed for any significant relationship using Chi-square test and Unpaired t-test and Pearson’s correlation.

Results: Mean age of the participants of group A was 39.94±11.59 years and group B was 47.78±11.53 years. The difference in gender distribution and average BMI of both groups was not statistically significant (p-value=0.8599 and p-value=0.4497, respectively). On comparison of group A and group B2, average High Density Lipoprotein Cholesterol (HDL-C) level was comparatively higher amongst group B2 (52.18±11.87 mg/dL vs 45.81±12.76 mg/dL; p-value=0.0038) and average Triglyceride (TG) level was higher amongst group A (104.58±70.35 mg/dL vs 129.38±64.34 mg/dL; p-value=0.0308). There was no statistically significant linear correlation found between lipid profile parameters and Vitamin D.

Conclusion: In present study, no significant correlation between Vitamin D deficiency and serum lipid profile was found. However, a statistically significant difference was found in average levels of HDL-C and TG amongst adults with adequate Vitamin D and those with Vitamin D deficiency.

Keywords

Dyslipidaemia, Healthy adults, Prevalence, Vitamin D deficiency

Vitamin D deficiency is globally prevalent and is endemic in India (1). The prevalence of Vitamin D ranges from 70%-100% in various geographical regions, ethnic groups, and socio-economic strata (1). Besides the known skeletal effects of Vitamin D deficiency there are various extra-skeletal associations of Vitamin D deficiency that have been found. The association of 25-hydroxy Vitamin D (Vitamin D) deficiency with atherosclerosis (2), myocardial infarction, and stroke, has been reported (3),(4).

Vitamin D is derived from 7-dehydrocholesterol in the skin upon irradiation from UV rays. 7-dehydrocholesterol is part of the metabolic pathway that controls the synthesis of cholesterol in human cells (5). The possible interplay between Vitamin D metabolism and cholesterol metabolism can be explained by theories that involve the feedback mechanisms and interactions involving the Vitamin D metabolites, receptor and various enzymes of the cholesterol metabolism pathway (5). These possible mechanisms include driving of Sterol Regulatory Element Binding Protein mediated feedback; suppression of 3-hydroxy-3-methyl-glutaryl-coenzyme-A reductase and Vitamin D receptor mediated CYP7A1 activity induction (5). Therefore; it is reasonably pertinent to examine the association, if any, between Vitamin D deficiency and dyslipidaemia.

Studies conducted in China (6), and the middle east (7) found that low levels of Vitamin D were associated with increased Total Cholesterol (TC), Low Density Lipid Cholesterol (LDL-C), and Triglycerides (TG) in the study participants. However, there are very few studies done on Indian subjects (8),(9). The study conducted by Chaudhuri J et al., (8) in 2011 on urban population including 150 residents of Hyderabad, found that Vitamin D deficiency was associated with dyslipidaemia. Another observational study of 400 participants was conducted on rural population of West Bengal by Mukhopadhyay P et al., (9). The study concluded that TC, LDL and TG were significantly higher in the deficient Vitamin D group.

However, it is known that rural and urban population have different lifestyles in terms of diet and activity. This can impact the prevalence of co-morbidities in them. A systematic review by de Groot R et al., analysed the difference in lipid profiles of urban vs rural population and found a higher prevalence of high LDL, TC and TG in urban population compared to rural (10). Thus, the authors believe that there is need of another study on urban population. So far, there is no study on the association of Vitamin D and lipid profile conducted in western India. The present study, to the best of authors’ knowledge, is the first cross-sectional study on correlation of serum Vitamin D levels and lipid profile in metropolitan city of Mumbai with a large and diverse sample size of 243 participants.

Material and Methods

This cross-sectional study was conducted in SevenHills Hospital, Mumbai, Maharashtra, India (tertiary care hospital), from December 2016 to August 2017. The approval was obtained by the Ethics Committee of the Hospital (Reg.No. ECR/679/Inst/MH/2014). Participants were included in the study after informed written consent was obtained.

Inclusion criteria: Healthy adults ≥18 years of age, without any apparent illness and who consented for the study were included in the study.

Exclusion criteria: Persons taking drugs acting/modifying lipid metabolism like statins, vitamin D supplements, patients on antiepileptics, antituberculosis, and antiretroviral medication were excluded from the study. Pregnant or lactating ladies, those diagnosed with chronic thyroid, hepatic and renal disorders were also excluded (11).

Sample size calculation: Sample size of minimum 88 participants for each group of sufficient and deficient Vitamin D was calculated from the formula: n1=n2=(z1-α/2+z1-β)2 *p1(1-p1)+p2(1-p2)/(p1-p2)2.

where,

n1=sample size for group A i.e. Vitamin D <20 ng/dL; n2=sample size for group B i.e. Vitamin 25 D ≥20 ng/dL.
α= probability of type I error (usually 0.05);
β= probability of type II error (taken as 0.1);
the power of the study was considered here as 90%;
z= critical Z value for a given α or β.
critical value for Zα two tailed was 1.96,
critical value for Zβ two tailed was 1.282.
Here p1 was 30.7% and p2 was 54.2%
Thus, p1-p2= -23.5% substituting the values in the formula (12):
n1=n2=(1.96+1.282)2 (0.542 (1-0.542)+0.307 (1-0.307)/(23.5) 2=87.736~90
Convenience non probability sampling method was used for sampling method.
Study participants were divided into two groups based on Vitamin-D levels:

Group A (n=139): Vitamin D <20 ng/mL (Vitamin D deficient group)
Group B (n=104): Vitamin D ≥20 ng/mL (Vitamin-D non deficient group)

Group B was further segregated into subgroups as per Endocrine Society clinical practice guidelines (13):
Subgroup B1 (n=60): Vitamin D level ≥20 to <30 ng/mL (Vitamin D insufficient subgroup)
Subgroup B2 (n=44): Vitamin D level ≥30 ng/mL (Vitamin D sufficient subgroup)
Components of serum lipids in all groups/ subgroups were compared with serum Vitamin D levels for statistically significant association.

Study Procedure

Medical history and demographic data of participants was recorded on predesigned proforma. Details recorded were age, gender, past medical illness, and anthropometric data such as height and weight; was recorded with study participants wearing light clothes, without footwear. Body Mass Index (BMI) was also calculated.

A sample of 10 mL peripheral fasting venous blood was collected in a plain tube. Blood samples were centrifuged at 2500 rpm for 10 minutes. Separated serum was loaded on Roche Cobas-6000 auto-analyser (14) for estimation of Vitamin D and serum lipid components (15). Dyslipidaemia was defined when one or more of lipid components exceeded the upper limits of laboratory normative values; TC >200 mg/dL, LDL-C >130 mg/dL, HDL-C <40 mg/dL, VLDL-C >30 mg/dL, and TG >150 mg/dL (as per adult treatment panel-ATP III criteria) (16). Details of various test used to assess biochemical parameters used in the present study are as described in (Table/Fig 1).

Statistical Analysis

Data was recorded, tabulated, and statistically analysed in Microsoft excel office 16. Chi-square test was used to test the significance of association between tabulated values of data and qualitative, categorical data. Two-tailed Unpaired t-test was used to compare differences between mean of quantitative measurements. Pearson’s Correlation analysis was applied to assess the relation of Vitamin D (independent variable) with each component of the serum lipids (dependent variables) in each of the two groups. A p-value of <0.05 was considered statistically significant.

Results

The 243 participants of the study were divided into three groups. Group A had 77 (55.4%) males, 62 (44.6%) females and Group B had 57 (54.8%) males, 47(45.2%) females. Both groups were comparable for gender distribution (p-value=0.8599). Mean age of the participants in group A (39.94±11.59 years) were significantly lesser than group B (47.78±11.53 years; (p-value <0.0001). Vitamin D deficiency was thus observed more amongst younger age group. The BMI in group A was (27.12±7.34 kg/m2) and in group B was (27.75±4.92 kg/m2). The average BMI of both groups was statistically comparable (p-value=0.4497).

Prevalence of dyslipidaemia amongst participants of group A was 90 (64.75%) vs 62 (58.65%) in group B. This was statistically comparable (p-value=0.4135). Prevalence of dyslipidaemia in group B1 was 32 (53.33%) vs 29 (65.9%) in group B2. On comparison; prevalence was comparable in group B1 and B2 (p-value=0.2779) (Table/Fig 2).

Average levels of individual lipid components (HDL, LDL, TG, TC and VLDL) in group A and group B participants were comparable using Unpaired t-test analysis (p-value for LDL=0.1518, p-value for HDL=0.4003, p-value for VLDL=0.6081, p-value for TG=0.5407, p-value for TC=0.7650, respectively) (Table/Fig 3).

On comparison of group A and group B1, there was no significant difference between the average levels of HDL, LDL, TG, TC and VLDL between both the groups. Comparatively lower levels of HDL Cholesterol (p-value=0.0038) and higher levels of Triglyceride (p-value=0.0308) was observed amongst group A participants (Vitamin D deficient group was HDL-45.81±12.76 mg/dL; TG was 129.38±64.34 mg/dL) when compared with those of subgroup B2 (Vitamin D Sufficient subgroup HDL was 52.18±11.87 mg/dL; TG was 104.58±70.35 mg/dL). This was statistically significant (p-value=0.0038 for HDL, p-value=0.0308 for TG). The observed intra group B differences (group B1 vs group B2) among individual lipid component levels between subgroup B1 and subgroup B2 were statistically not significant (Table/Fig 4).

On further analysis, there was no statistically significant linear correlation (direct or inverse) amongst any lipid profile parameter and Vitamin D on analysing with Pearson’s correlation test. There was a negative correlation found between Vitamin D and LDL (r-value= -0.1211, p-value= 0.0596), TG (r-value=-0.0029, p-value= 0.97536) and TC (r-value=-0.0657, p-value= 0.3149) but was not statistically significant (Table/Fig 5).

Discussion

The current cross-sectional observational study on asymptomatic adults, show 57.2% subjects had Vitamin D deficiency and 24.69% subjects had Vitamin D insufficiency. Thus, 81.89% asymptomatic participants in th study had less than adequate level of Vitamin D (Vitamin D <30 ng/mL). Details regarding gender and age distribution of study population is further discussed in Hinduja ARA et al., (17).

Dyslipidaemia are known to carry high-risk of atherosclerosis and cardiovascular morbidities (18). In this study, dyslipidaemia was observed in 152 (62.55%) of 243 participants-122 (61.31%) participants with combined Vitamin D deficiency and insufficiency (group A and B1), and in 30 (65.9%) participants having adequate levels of Vitamin D (group B2). The observed prevalence of dyslipidaemia in the two groups (combined Vitamin D deficient and insufficient) group and Vitamin D sufficient group was statistically not significant (p-value=0.393). Prevalence of dyslipidaemia in group A (Vitamin D deficient) and sub group B2 (Vitamin D sufficient) was also observed to be similarly not significant. The observed proportion of dyslipidaemia amongst study participants is higher than reported by Gupta R et al., in their review article, stating high total cholesterol levels in the Indian population, ranging between 25-30% amongst urban and 15-20% amongst rural population (19). Gupta R et al., (19) have also pointed to progressive increase of TC, LDL-C and TG levels over a 20 year period. Faridi KF et al., have reported moderate increase in risk of dyslipidaemia in Vitamin D deficient subjects in a prospective five years study (20). A recent study conducted in Nepal by Nepal R et al., found that in patients with acute coronary syndrome, the mean Vitamin D levels were lower for patients with dyslipidaemia (21). Observed lack of association of dyslipidaemia with low (deficient and insufficient) levels of Vitamin D in the present study; is in contrast to study of Chaudhuri J et al., who reported higher prevalence of dyslipidaemia (54.2) in vitamin D deficient population compared to those having sufficient Vitamin D levels (30.7%) (8).

Current study observed higher mean HDL-C levels in participants with adequate Vitamin D when compared with those of Vitamin D deficient participants (p-value=0.0038) and lower TG levels amongst participants with adequate Vitamin D levels when compared with those of Vitamin D deficient participants (p-value=0.0308). Like the current study other international studies (7),(20),[22,]23] have also reported significant differences in the serum levels of HDL (22),(23) and TG levels (23) for those with adequate level of Vitamin D when compared to those with Vitamin D deficiency. Amongst the Indian studies published so far, higher levels of serum triglyceride observed amongst Vitamin D deficient adult participants has also been reported by Chaudhuri J et al., (8). The observed statistically significant lower serum triglyceride levels amongst people with adequate Vitamin D in the present study has also been corroborated by these studies. However, significantly elevated LDL cholesterol amongst Vitamin D deficient individuals reported by Chaudhuri J et al., was not observed in current study (8). Comparison of the present study to the various similar national and international studies available are presented in (Table/Fig 6) (6),(7),(8),(20),(22),(23),(24),(25),(26),(27),(28),(29).

The current observational study on asymptomatic adult participants has established no significant linear correlation (Pearson’s correlation) of serum lipid components with low levels of Vitamin D. This is finding is corroborated by studies of Doddamani S and Shetty P (24), Annapurna K and Swarnalatha PK (25) and Tosunbayraktar G et al., (23). However, observed statistically significant differences between average triglyceride levels and HDL-C levels amongst Vitamin D deficient and Vitamin D sufficient adults, is an interesting finding of the study.

Limitation(s)

Impact of dietary preferences and other metabolic variables (such as parathyroid hormone, calcium and phosphorus level) had not been factored in the study. Thus, observed findings of the study cannot be generalised.

Conclusion

Average triglyceride levels were lower and average HDL-C levels were higher in adults with adequate Vitamin D. Differences observed in other serum lipid components amongst adults of these two groups were not statistically significant. No statistically significant correlation (direct or inverse) could be established for serum TC, VLDL-C and LDL-C with serum Vitamin D levels in this observational study. We suggest, that to generalise the observed causal relationship between Vitamin D and serum lipid levels; suitably stratified randomised multicentric study across distributed geography of the country with large sample size with supplementation should be undertaken.

Authors contribution: This study was a part of PG thesis conducted at SevenHills Hospital under the guidence of AA and DC. AA and DC involved in the inception of the topic, supervision of analysis and drafting of the first version of the manuscript. HW and DP were involved in scripting the manuscript.

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DOI and Others

DOI: 10.7860/JCDR/2022/56822.16988

Date of Submission: Apr 02, 2022
Date of Peer Review: May 31, 2022
Date of Acceptance: Jul 08, 2022
Date of Publishing: Nov 01, 2022

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. NA

PLAGIARISM CHECKING METHODS:
• Plagiarism X-checker: Apr 27, 2022
• Manual Googling: Jun 29, 2022
• iThenticate Software: Jul 07, 2022 (14%)

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