Table 2.

Effect of DAT1 polymorphisms on BDI, HDRS, and BMI

Characteristics	10/10 (n=167)	10/9 (n=175)	9/9 (n=22)	P-value	Post hoc
Sex	101 (F)/66 (M)	115 (F)/60 (M)	15 (F)/7 (M)	0.5	No significance
Age, years	60.0 (21–72)	56.0 (20–76)	52.0 (23–68)	0.02	No significance
BDI	9 (6–18)	11 (5–17)	13 (10–20)	0.022	No significance
HDRS	3 (1–14)	4 (2–11)	16 (10–20)	0.00001	10/10 vs 10/9, P=0.2 10/10 vs 9/9, P=0.00006 10/9 vs 9/9, P=0.000004
BMI	35.2 (31.2–43.9)	35.3 (31.1–46.0)	40.1 (38.8–57.0)	0.001	10/10 vs 10/9, P=0.07 10/10 vs 9/9, P=0.002 10/9 vs 9/9, P=0.03

Notes: Values are expressed as the median (25%–75%). Significance of differences between genotypes was determined by Kruskal–Wallis ANOVA. Bold values indicate statistical significance.

Abbreviations: BDI, Beck Depression Inventory; HDRS, Hamilton Depression Rating Scale; BMI, body mass index; 9, nine-repeat allele; 10, ten-repeat allele; F, female; M, male; ANOVA, analysis of variance.