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Rivista di Pediatria, Neonatologia, Medicina dell’Adolescenza
e Neuropsichiatria Infantile

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Minerva Pediatrica 2015 Jul 08

lingua: Inglese

Second to fourth digit ratio, sex differences and antropometric measuments; their relationship in children

Uludag A. 1, Tekin M. 2, Ertekin Y. H. 2, Şahin E. M. 2, Cevizci S. 3, Cıbık B. 2, Oguz S. 4, Erbag O. 2

1 Canakkale Onsekiz Mart Universitesi, Tıp Fakültesi, Aile Hekimliği Anabilim Dalı, Terzioğlu Yerleşkesi, Canakkale, Türkiye;
2 Canakkale Onsekiz Mart University, Faculty of Medicine, Department of Family Medicine, Canakkale, Turkey;
3 Canakkale Onsekiz Mart University, Faculty of Medicine, Department of Public Health, Canakkale, Turkey;
4 Canakkale Onsekiz Mart University, Faculty of Medicine, Department of Dermatology, Canakkale, Turkey;


AIM: to determine the effect of socio-demographic factors and antropometric measurements on 2/4 digit ratio in the school aged children.
METHOD: This cross-sectional study was completed in primary and secondary schools in the city center of Canakkale, Turkey. The students given parental permission were seated at a table by the responsible doctor and asked to extend the palm of the right and left hand in the schools. Using a vernier caliper the 2/4 fingers were measured from the palm twice and results were noted together with socio-demographic information. Weight, length, waist and hip measurements were taken while students were behind a folding screen.
RESULTS: A total of 1860 students from 5-14 years were included in the study. The right hand 2/4 digit ratio was 0.9765±0.035 and the left hand ratio was 0.9716±0.036 for girls. For the boys the ratios were 0.9688±0.035 for right hand and 0.9653±0.033 for left hand. The digit ratios of girls were significantly higher than boys and the right hand ratio was even greater.
The 2/4 digit measurements of both hands of students were positively correlated with each other. Digit ratio increased at a moderate rate with age and showed a low rate correlation of increase with other anthropometric measurements and monthly income amount. In regression model left hand 2/4 ratio is dependent hip circumference, monthly income and gender as adjusted r2 0.051. The right hand 2/4 ratio was dependent gender, monthly income, hip circumference and birthweight as adjusted r2 0.041.
CONCLUSION: The 2/4 digit ratio of school-age children in the Turkish population differed based on gender; the girls have higher digit ratios. Digit ratios depend on the hip circumference, gender (girls have higher ratio), birthweight, gestation week and monthly income. There is need for further research especially the effect of monthly income.

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