Table 1 Descriptive statistics by ASR preference and behavior groups: mean (SD).

From: Differences in digit ratios between gay men who prefer receptive versus insertive sex roles indicate a role for prenatal androgen

 

Age (years)

Ethnicity

Right 2D:4D

Left 2D:4D

Childhood GNC

Adulthood GNC

Gay men (n = 125)

38.9 (13.9)

2.58 (3.39)

0.961 (0.054)

0.958 (0.052)

3.32 (0.41)

3.17 (1.61)

Anal sex role preference

 Bottom (n = 43)

35.6 (14.8)

3.49 (4.35)

0.976 (0.049)

0.964 (0.045)

3.24 (0.45)

3.7 (1.56)

 Versatile (n = 51)

39.2 (13.3)

2 (2.59)

0.958 (0.057)

0.956 (0.051)

3.28 (0.39)

3.22 (1.64)

 Top (n = 31)

43 (12.9)

2.32 (2.83)

0.945 (0.049)

0.951 (0.062)

3.49 (0.35)

2.35 (1.31)

Anal sex role behavior

 Bottom (n = 45)

37.2 (15.5)

3.41 (4.24)

0.966 (0.05)

0.953 (0.047)

3.24 (0.41)

3.8 (1.51)

 Versatile (n = 33)

38.1 (13.8)

1.94 (3)

0.959 (0.058)

0.963 (0.053)

3.35 (0.4)

3.12 (1.67)

 Top (n = 44)

41.4 (1.82)

2.2 (2.57)

0.956 (0.054)

0.958 (0.058)

3.38 (0.41)

2.5 (1.41)

  1. Ethnicity was measured on a 13-point scale (1 = Caucasian, 2 = Black, 3 = Chinese, 4 = Filipino, 5 = Aboriginal, 6 = Latin American, 7 = Arab, 8 = Southeast Asian, 9 = West Asian, 10 = Korean, 11 = Japanese and 12 = other). Right- and left-hand digit ratios were calculated by dividing the length (mm) of the index finger (2D) by the length of the ring finger (4D). Childhood GNC was calculated based on an 18-item questionnaire, where lower scores indicate more gender nonconformity10. Adulthood GNC scores are derived from a on a 7-point Likert scale: 0 (more masculine), 3 (same), 6 (more feminine), thus higher scores indicate more gender nonconformity.
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