손가락길이 측정방법에 따른 둘째넷째손가락길이비의 차이
Difference of Second to Fourth Digit Ratio according to the Methods of Measuring Length
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초록
둘째넷째손가락길이비(2D : 4D)는 태아기 성호르몬의 노출정도를 반영하며, 이를 밝히기 위한 손가락길이 측정에 여러 가지 방법이 사용되었다. 이에 본 연구는 주로 사용하는 4가지 손가락길이 측정방법의 차이를 비교함으로써 가장 정확하고 효과적인 손가락길이 측정방법을 제시하고자 시도되었다. 연구대상은 대학생 272명(남자 115명, 여자 157명)이었으며, 둘째손가락과 넷째손가락 길이 측정은 4가지 방법, 즉 캘리퍼와 눈금자를 이용하여 직접 측정하는 방법, 복사본을 측정하는 방법, 방사선사진을 측정하는 방법을 이용하였다. 자료분석은 SPSS 19.0 win을 이용하였으며, 분석방법은 independent t-test, paired t-test, Pearson correlation analysis를 사용하였다. 연구결과, 남녀 모두 방사선사진을 측정하는 방법이 손가락길이가 가장 길게 나타났으며, 둘째손가락과 넷째손가락의 길이 차이는 방사선사진을 측정하는 방법이 가장 컸고, 복사본을 측정하는 방법이 그 다음 순서였다. 4가지 손가락길이 측정방법 모두 유의한 성차이가 나타났으며, 방사선사진을 측정하는 방법과 복사본을 측정하는 방법의 성차이가 두드러지게 나타났다. 또한 직접측정법보다 간접측정법의 손가락길이비가 유의하게 더 낮았다. 방사선사진을 측정하는 방법과의 상관관계는 복사본을 측정하는 방법(r=0.590), 캘리퍼로 직접 측정하는방법(r=0.586) 순서로 높았다. 결론적으로 둘째넷째손가락길이비를 이용한 연구에서 방사선사진을 측정하는 방법의 대안으로 1차적으로 복사본을 캘리퍼로 직접 측정하는 방법, 2차적으로 캘리퍼로 직접 측정하는 방법이 제시될 수 있을 것으로 사료된다.
Abstract
The 2nd to 4th digit ratio (2D : 4D) reflects exposure level of sex hormones in fetal period and there are various methods for finger length measurement. The aim of this study is to identify an accurate and effective method for finger length measurement. This study was done on 272 individuals (115 males, 157 females). Data were collected by measuring index and ring finger length on both hands by calipers, ruler, photocopy, and radiography. The data were analyzed through independent t-test, paired t-test, Pearson correlation analysis using SPSS win 19.0. This study showed that the 2nd and 4th finger measured by radiography were the longest finger both of males and females and revealed the largest length difference between 2nd and 4th finger. There were significant sex differences all of 4 measurement methods in 2D : 4D, especially remarkable sex difference by radiography and photography. The 2D : 4D by indirect measurement was lower than that of direct measurement. Correlation between digit ratio by radiography and by photocopy was 0.590 and correlation between digit ratio by radiography and by calipers was 0.586. The results of this study suggest that indirect measurement by radiography can be alternated by photocopy primarily and by calipers secondarily.
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