Skip to main content

Table 1 Demographical characteristics of each genotype group

From: Association between the melanopsin gene polymorphism OPN4*Ile394Thr and sleep/wake timing in Japanese university students

Genotype TT TC CC P- value
n 223 91 14  
Sex (M:F) 122:101 49:42 4:10 0.163 (χ2)
Age (years ± SD) 21.0 ± 2.3 20.8 ± 2.0 21.3 ± 1.5 0.667