Original article / research
Community-based Photogrammetric Assessment of Nasal Angles among Adults in the Garhwal Himalayas, Uttarakhand, India
Correspondence Address :
Dr. Niyati Airan,
Associate Professor, Department of Anatomy, Veer Chandra Singh Garhwali Government Institute of Medical Science and Research, Srinagar Garhwal-246174, Uttarakhand, India.
E-mail: niyatiairan@gmail.com
Introduction: The nose has long been known to hold an important place in the medical sphere, owing to its important functions in olfaction and respiration. Its normal morphology and morphometry are also crucial for determining facial aesthetics. Different types of nasal deformities are also seen to be associated with various congenital anomalies. Anthropometry of the nose varies with age, gender and ethnicity.
Aim: To explore region-, ethnic-, and gender-specific nasal angulations of the adult population of Garhwal, Himalayas, Uttarakhand, India.
Materials and Methods: This community-based cross-sectional observational study was conducted at the Department of Anatomy, Veer Chandra Singh Garhwali Government Institute of Medical Science and Research, Srinagar Garhwal, Uttarakhand, India, from July 2024 to June 2025. Multistage sampling was applied to measure 141 males and 105 females residing in the Garhwal Himalayas, using the photogrammetric method. Nasofrontal, nasofacial, nasolabial, nasal-tip and inter-alar angles were measured employing the Magnus Analytics MagVision application. Descriptive (Mean and Standard deviation) and inferential (Independent t-test and Welch’s t-test) statistics were done by Statistical Package for Social Sciences (SPSS) software, with p<0.05 as significant.
Results: Means of nasofrontal angle was 123.79°±13.28° in males and 133.59°±6.72° in females, nasofacial angle was 33.94°±4.74° in males and 32.08°±3.47° in females, nasolabial angle was 93.49°±13.61° in males and 96.07°±12.20° in females, nasal-tip angle was 82.03°±5.05° in males and 82.69°±6.09° in females, inter-alar angle was 77.73°±10.58° in males and 79.14°±10.16° in females. Nasofrontal angle was found to be significantly higher in females, whereas nasofacial angle was higher in males. All angles also showed significant differences with those found by other authors in various ethnicities.
Conclusion: Normal values of nasal angular parameters of the Garhwal Himalayan population have been established in this study. This will prove its worth during plastic surgeries of the face, diagnosing genetic diseases, manufacturing facial accessories and criminal investigation procedures.
Anthropometry, Face, Genetics, Nose, Plastic surgery, Reconstruction
The world has seen an uproar in the development of digital life over the past few decades with the evolution of social media and artificial intelligence platforms, leading to an increased emphasis on a flawless digital footprint (1). This development led to an increased consciousness of one’s bodily appearance (2). In this context, facial appearance becomes the main priority (3). Beauty has often been assessed for many centuries by overall facial harmony. This includes shape, size, proportion, orientation, location and symmetry of its various parts such as nose, lips and chin (4),(5). The nose holds the central point in affecting the aesthetics (6) of an individual and occupies one-third of the total facial length (7). Besides its linear dimensions, the angulation of the nose with respect to the forehead, upper lip, and facial plane plays a significant role in making the face appealing. The dimensions of the nose change with age, gender, race, ethnicity, terrain, environmental conditions and constitutional makeup of an individual (8),(9),(10),(11),(12),(13).
Adenoids, a common condition seen in childhood, often present with a high-arched palate, malocclusion of teeth in the upper jaw and narrowing of the nasal cavity. This deformity may persist in later life, compromising the looks of an individual and patency of the airway (14). Corrective surgery will thus help in the betterment of appearance and restoration of the airway (15). Infections like Syphilis, septal abscess and submucosal resection of the nose lead to changes in the nasal morphology (16). Nasal deformities can also result from certain congenital anomalies and genetic syndromes like Trisomy 13, 18 and 21 (11),(13). This warrants an early diagnosis with timely and appropriate intervention. So, it becomes a necessity to document an anthropometric database of nasal dimensions specific for age, gender and region (17),(18).
Garhwal region of Uttarakhand, located in the Shivalik range of the Himalayas, is highly unstable and experiences frequent landslides and other calamities (19). This may lead to trauma involving the head and neck region. The nose, being a prominent part of the face and structurally osseocartilaginous, is especially vulnerable to frequent injuries, requiring reconstruction of the face for restoration of normal appearance. Very few studies have been found for nasal parameters in the literature search for this region (5). So, an attempt was made to gather insights for the anthropometry of nasal angles of the adult population of the Garhwal region to evaluate for sexual dimorphism and regional variations. This will aid reconstructive surgeons during pre-operative planning of cosmetic surgeries involving the nose (8),(9),(10),(18). Geneticists will also find use of this data to exclude different congenital syndromes (17). Moreover, this data will be beneficial for biomedical engineers to design ergonomically suited facial accessories and prostheses. This will also find potential future application in personal identification from fragmentary/mutilated bodily remains, for individual profiling during crime scenes (8),(20), and also in training software running on artificial intelligence (21). Anthropologists will also find use of it for understanding differences between various races (8).
A community-based cross-sectional observational study was conducted at the Department of Anatomy, Veer Chandra Singh Garhwali Government Institute of Medical Science and Research, Srinagar Garhwal, Uttarakhand, India, over a period of one year (July 2024 to June 2025). The study was approved by the Institutional Ethics Committee (vide their letter no.- MC/IEC/2024/41 dated 01/07/2024). Informed, written, and witnessed consent was taken from every individual before being sampled.
Inclusion criteria: A total of 246 healthy individuals of both gender of age group 18 to 40 years were studied using the photogrammetry method (22),(23) and were included.
Exclusion criteria: Individuals with congenital anomalies or acquired conditions, such as suffering from allergic conditions of the nose or having growth disorders, sustained injury or having undergone surgery in the head and neck region, were excluded from the study (9),(11),(24),(25),(26). Those with more than one piercing (27),(28) were also excluded.
Sample size calculation: Sample size was calculated using the formula:
n= (Z2×σ2)/d2, where
n: sample size,
Z: Z-score (1.96) for 95% confidence level,
σ: Standard deviation of nasolabial angle, taken from a previous study (Males: 9.60, Females: 9.33) (29) and
d: margin of error assumed to be 2.
This amounted to a sample size of 171. The sample was divided into 15 blocks of Garhwal, taking representation from two genders aged 18-40 years (Table/Fig 1). A complete list of the individuals of the region was procured from the district statistics office. Then a sample was drawn using a computer-generated random number table employing the above-stated multistage sampling technique (30).
Study Procedure
The participants were made to stand in anatomical position on a level ground with head positioned in Frankfort’s horizontal plane and facial muscles relaxed (12). Individuals were then photographed under daylight with a similar background using a Samsung Galaxy M34 5G device with a 50-megapixel camera placed at a constant distance of 167cm calibrated according to the standardised and applicable calibration techniques (6),(31),(32).
Nasofrontal angle (31),(32): between the lines drawn from glabella (1) to nasion (2) and to the pro-nasale (3); Nasofacial angle: (9),(17) between the lines drawn from the pro-nasale (3) to nasion (2) and to the gnathion (4); Nasolabial angle (29),(33): between the lines drawn from the pro-nasale (3) to sub-nasale (5) and along the philtrum (6); Nasal-tip angle (34),(35): between the lines drawn from nasion (2) to pro-nasale (3) and to sub-nasale (5); Inter-alar angle (36),(37),(38): between the two tangents drawn from the widest point of two alae directed medially and intersecting each other (7,8) as depicted in (Table/Fig 2). This study is reported in accordance with the STROBE (Strengthening the Reporting of Observational Studies in Epidemiology) guidelines for cross-sectional studies.
All photographs were taken by the same investigator. Magnus Analytics MagVision software was used to measure the angles digitally. Intra-observer reliability was checked by taking measurements thrice by the same observer and was found to be excellent with an Intra-class Correlation Coefficient (ICC) value of 0.97 (95% CI of 0.97-0.98). Inter-observer reliability was demonstrated to be good with an ICC value of 0.78 (95% CI of 0.72-0.82), when measurements were made by two observers.
STATISTICAL ANALYSIS
Statistical Package for Social Sciences (SPSS) software was used for analysis. Descriptive statistics viz., mean, standard deviation and 95% confidence interval, were calculated for all the parameters. Independent t-test was used to compare the angles between the two genders, and two-sample t-test (Welch’s t-test) was used with different populations studied by other authors. The p-value <0.05 was taken as significant, and effect size was calculated to determine the strength of significance.
A total of 246 individuals (141 males and 105 females) were included. Mean age for males was found to be 30±7.16 years and for females to be 28±7.38 years. Angular nasal dimensions of both genders are illustrated in (Table/Fig 3) and plotted on (Table/Fig 4).
Baseline data of various nasal angles of both genders for the adult population of the Garhwal region of Uttarakhand were compiled. A significantly greater nasofrontal angle was observed in females as compared to males. This finding is in accordance with the studies conducted by Uzun A and Ozdemir F, Asghari A et al., and He Z-j et al., (10),(35),(39). To the contrary, Babaei K et al., Safi-Eddine Z et al., and Choi JY et al., did not find any significant difference between the two genders (9),(32),(40).
Nasofacial angle was documented to be significantly greater in males in comparison to females in the present study, whereas no significant differences between the genders were observed by Babaei K et al., and Safi-Eddine Z et al., (9),(32).
The present study also revealed no significant sexual dimorphism in the nasolabial angle. This finding is in alignment with Babaei K et al., Uzun A and Ozdemir F, Othman SA et al., Safi-Eddine Z et al., Asghari A et al., He Z-j et al., and Choi JY et al., (9),(10),(29),(32),(35),(39),(40).
Nasal-tip angle demonstrated no statistically significant differences in the two genders. Similar results were found by He Z-j et al., (39). Safi-Eddine Z et al., in 2024, studied Nasal-tip angle in the Moroccan population using the photogrammetry method, taking 20 males and 31 females. They found significant differences between the two genders for the same (32). Similarly, Uzun A and Ozdemir F and Asghari A et al., also found significant differences between the two genders (10),(35). The current study shows no significant sexual dimorphism in the inter-alar angle, which is in validation to the study conducted by Pazos JAT et al., (36).
These angular dimensions were compared with those found by other authors measured on different populations worldwide, as mentioned in (Table/Fig 5),(Table/Fig 6),(Table/Fig 7),(Table/Fig 8),(Table/Fig 9) (9),(10),(17),(18),(29),(31),(32),(33),(34),(35),(36),(39),(40),(41). The parameters were observed to be significantly different across different ethnicities, implying the impact of geographical and genetic factors on the development of the nose (13). This is in confirmation with the views shared by other researchers (9),(10),(17),(28),(32),(41),(42).
Studies conducted in South-India (17), Turkey (10) and Morocco (females) (32) revealed no significant differences in nasofrontal angle as compared to Garhwal, Himalayas. Egyptian (31) and Moroccan males (32) exhibited no statistically significant variation for nasofacial angle when compared to males of the present study.
The nasolabial angle of the current study was not found to be significantly different from that of Moroccan males and females (32), South-west Iranian (9) and Turkish males (18).
The study conducted by Uzun A and Ozdemir F in Turkey did not display any reliable difference in males for Nasal-tip angle with that of Garhwali males (10).
Uzun A and Ozdemir F in 2014 stated nasal angles to be reliable parameters for planning reconstructive surgical intervention (10). Babaei K et al., in their study using a photogrammetric method and protractor, opined that population- and gender specific data can help surgeons in planning preoperative surgical outcomes (9).
Limitation(s)
Only the photogrammetric method was employed in the study due to time constraints, and hence its effectiveness and reliability to obtain accurate results could not be checked when compared to other conventional techniques. Future studies using different methods, on broader age groups, will yield precise results generalisable to all age groups.
The study has prepared baseline data of average nasal angles for the residents of the Garhwal area of Uttarakhand and has corroborated sexual dichotomy for nasofrontal and nasofacial angles. It also confirms all angular dimensions to be specific for different ethnicities, which makes them distinct from other populations who experience different environmental and geographical conditions. Reconstructive surgeons will benefit from this information while performing various cosmetic and therapeutic surgeries. Geneticists will use this data for diagnosis of congenital syndromes. Biomedical engineers can utilise this data to develop ergonomically adapted facial accessories and prostheses. It will also be useful for identifying the source of partial remains found during medicolegal investigations by forensic experts. Clinical anatomists and anthropologists can further elaborate this during future research. The present study has also confirmed the feasibility and acceptability of the photogrammetric method for anthropometric studies in the community setting owing to its non invasive nature and easy to use.
The authors deeply appreciate the volunteers for becoming a part of the study, the people who supported its execution and the institute for providing the logistics.
Authors’ contribution: NA: Concept and design, data collection, statistical analysis, manuscript drafting, critical revision; AKD: Concept and design, data collection, statistical analysis, manuscript drafting, critical revision; AS: Concept and design, data collection, statistical analysis, manuscript drafting, critical revision; VA: Concept and design, data collection, statistical analysis, manuscript drafting, critical revision.
DOI: 10.7860/JCDR/2026/90357.24385
Date of Submission: May 07, 2026
Date of Peer Review: Jun 15, 2026
Date of Acceptance: Jul 28, 2026
Date of Publishing: Sep 01, 2026
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. Yes
PLAGIARISM CHECKING METHODS:
• Plagiarism X-checker: May 10, 2026
• Manual Googling: Jul 23, 2026
• iThenticate Software: Jul 25, 2026 (4%)
ETYMOLOGY: Author Origin
EMENDATIONS: 6
- Emerging Sources Citation Index (Web of Science, thomsonreuters)
- Index Copernicus ICV 2017: 134.54
- Academic Search Complete Database
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- Embase
- EBSCOhost
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- Indian Science Abstracts (ISA)
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- Popline (reproductive health literature)
- www.omnimedicalsearch.com
