Volume 16, Issue 2 (Summer & Autumn 2019)                   ASJ 2019, 16(2): 87-92 | Back to browse issues page

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Mojaverrostami S, Mokhtari T, Malekzadeh M, Noori L, Kazemzadeh S, Ijaz S, et al . Stature Estimation Based on Fingers Anthropometry in Iranian Population. ASJ. 2019; 16 (2) :87-92
URL: http://anatomyjournal.ir/article-1-208-en.html
1- Department of Anatomy, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
2- Research Center of Stem Cells in the Nervous System, Semnan University of Medical Sciences, Semnan, Iran.
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1. Introduction
Anatomical parameters like stature are important for personal identification. In forensic anthropology, the identification of unknown individuals and determination of why they have died are important [1]. Determination of gender, age, and stature from living or dead persons leads to a correct identification [2-4]. After mass disasters, explosions, wars or in definite murder situations where deceased bodies have been dismembered or mutilated, only a small part of a human body exists. Thus, the identification of individuals is necessary in such situations [5-8]. 
Estimation of stature with the help of gender, age, and ethnicity is a determinative parameter in the identification of decomposed or mutilated bodies [9]. Several methods are available for the estimation of stature from different body parts; most of them measure upper and lower limbs bones, such as metatarsal [10], foot [11], tibia [12], femur [13], ulna [14], upper arm [15], hand [16], fingers and phalanges lengths [17]. Although some studies have used the bony parts, others used soft tissue measurements and radiological techniques [18, 19].
Human height grows from intrauterine life to 20-25 years of age, and declines about 2.5 cm every 25 years, after the age of 30 [20]. Population-specific studies emphasize on stature estimations, because of the ancestral and ethnic differences that exist in the different regions of the world. Numerous studies developed regression models for predicting stature. The current study evaluated the anthropometric relationship between Fingers Length and stature, and provided stature estimation equations for Iranian students. 
2. Materials and Methods
A total of 195 healthy Iranian students (97 females and 98 males) of Tehran University of Medical Sciences, in the age range of 17-36 years were evaluated. All the individuals were right-handed and non-athletic. To prevent any technical and inter-observer mistakes, measurements were performed by the same observers and the same instruments. According to standard ethics by the Ethics Committee for Human Experimentations of Tehran University of Medical Sciences, the subjects were examined in terms of stature, Fingers Length, wrist breadth and hand breadth in the left side. Individuals with any deformity or disease in the vertebral column, hands, and fingers were excluded from this research.
All the subjects were requested to stand barefoot on the flat surface of floor with the head oriented in the Frankfurt Plane; stature was measured with anthropometer in centimeters. Upright height was considered from the vertex to the floor. As per Figure 1, Fingers Length was measured by a sliding caliper on the left hand from the most proximal flexion crease of the fingers to the tip of each finger.

Statistical analysis was performed by SPSS. The gender differences were tested using Independent Samples t-test. The association between stature and Fingers Length was determined by Pearson’s correlation coefficient. Linear regression analysis was used to determine equations for stature estimation from these measurements.
3. Results
In this study, the stature ranged from 148 to 194 cm in the students of Tehran University of Medical Sciences. The mean stature values of male and female were 177.84 and 162.96 cm, respectively. The mean weight of male students was 75.74 kg and mean weight of female students was 62.52 kg. The mean measurements of first Finger Length (1st FL), second Finger Length (2nd FL), third Finger Length (3rd FL), fourth Finger Length (4th FL) and fifth Finger Length (5th FL) in male students were 5.27, 7.70, 8.72, 7.92, and 6.07 cm, respectively. The mean measurements of 1st FL, 2nd FL, 3rd FL, 4th FL and 5th FL in female students were 4.77, 7.35, 8.22, 7.35, and 5.56 cm, respectively.
The mean, minimum, maximum and standard deviations of fingers measurements for Iranian males and females in addition to age, stature and weight measurements are presented in Table 1. According to the t-test results, the male population had significantly higher values in all dimensions, than the female population. There were significant differences between all measurements in both genders (P<0.001). The correlation coefficients and regression model need to be separately developed for the males and the females, because of the size differences between the two genders. 
The relationship between the stature and measured variables for both genders were analyzed using the Pearson’s correlation coefficient (Table 2). In the analysis of all subjects (total group), all measurements revealed significant correlation coefficients with stature (P<0.05). The 3rd FL had the highest correlation with stature (r=0.582). In the female group, 3rd FL (r=0.539) and 4th FL (r=0.490) had the highest correlation with stature; however, the remaining length was less relevant. In the male group, 3rd FL (r=0.503) had the strongest correlation with stature; the remaining measured variables were less relevant with it. Additionally, 1st FL length was not statistically correlated with stature (Table 2).
Linear regression analysis was conducted to estimate stature by the measured variables. Regression equations have been separately computed for each gender, as well as each measurement (Table 3). Stature was considered as the dependent variable and 1st FL, 2nd FL, 3rd FL, 4th FL and 5th FL, as the independent variables. The regression equations derived for the estimation of stature from measured variables are listed in Table 3. In the total group, third Finger Length (R2=0.338) was the highest determining factor in the regression equation (Table 3). The 3rd and 4th Finger Lengths (R2=0.253 and R2=0.157, respectively) demonstrated the highest accuracy among the female group (Table 3). Similarly, in the male group, the 3rd and 4th Finger Lengths (R2=0.290 and R2=0.240, respectively) suggested the highest accuracy (Table 3). The Standard Error of Estimate (SEE) predicted the deviations of estimated stature from the actual stature. It ranged between ±5.87 and ±6.74 for the males and between ±4.91 and ±5.60 for the females. A lower value of SEE indicates greater reliability in stature estimation. 
4. Discussion
In the current study, the relationship between stature and Fingers Length were evaluated, and equations for stature prediction were calculated from these measurements. Population variations are very important and these formulae are applicable on the studied population. Several studies have reported a positive relationship between stature and different body measurements [21, 22]. Previous studies suggested a strong correlation between upper limb length (r=0.89) [23] and lower limb length (r=0.89) [24], and stature. Additionally, our former study conducted on ulnar length in Chabahar City, Iran, demonstrated a positive correlation (male: r=0.59, female: r=0.57) with stature [25].
The present study indicated that gender differences in Fingers Length were statistically significant. Males demonstrated higher mean values in each anthropometric measurement, than females; this finding is in line with other studies [26-28]. This dissimilarity may be due to the fusion of bones (epiphyses) which occurs earlier in girls; thus, boys have more time for physical growth [29]. The 3rd FL in both genders exhibited higher correlation coefficients with stature. Therefore, 3rd FL is an appropriate parameter for estimating stature. This result was also supported by higher R2 and lower SEE in both genders. This result is compatible with Jee and Yun study who reported that 3rd Finger Length had the highest correlation with stature [1]. Akhlaghi et al. achieved the same result in Iranian population [30].
The obtained data suggested that Iranian females exhibit a lower SEE (±4.91-5.60 cm) in all measurements, than males (SEE: ±5.87-6.74). This finding indicates that the accuracy in predicted stature would be greater among females, than males. Similar results were informed by Krishan and Sharma [26]. According to anthropometric studies conducted on Fingers Length, the mean length of 2nd, 3rd, and 4th fingers in the studied subjects were longer than those of other studies (Table 4) [31]. Akhlaghi et al. have reported shorter Fingers Length in Iranian population, compared to the present study [30]. This might possibly relate to the distribution of various Iranian population around the country.
Fingers Length are reliable for the estimation of stature in personal identification. Third Finger Length provides a better prediction of stature. Stature prediction is more reliable in Iranian females, than males. The regression equations calculated from Fingers Length suggested that the stature can be estimated from them with SEE ranging from ±4.91 to ±6.78 cm for both genders. Further studies are required on stature estimation in respect of gender by Fingers Length in different age groups and various ethnicities of Iran. 
Ethical Considerations
Compliance with ethical guidelines
According to the standard ethics drawn by the Tehran University of Medical Sciences ethical committee for human experimentation, subjects were examined for different parameters.
This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
Authors contributions
Concept study design: Sina Mojaverrostami; Analysis, Interpretation of data, Critical revision of the manuscript: Tahmineh Mokhtari; Acquisition of data: Mehrnoush Malekzadeh, Leila Noori, Shokoofeh Kazemzadeh, Sahar Ijaz, Ibrahim Mohammed, Sina Mojaverrostami; Drafting the manuscript: Mehrnoush Malekzadeh, Leila Noori, Shokoofeh Kazemzadeh, Sina Mojaverrostami; and Study design, Administrative, technical and material support, and study supervision: Gholamreza Hassanzadeh.
Conflict of interest
The authors declared no conflict of interest.

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Type of Study: Original | Subject: Gross Anatomy
Received: 2018/06/25 | Accepted: 2019/02/19 | Published: 2019/07/1

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