Table 1.
Subject Characteristics
| PER3 Polymorphism | PER35/5 | PER34/4 | P |
|---|---|---|---|
| N | 10 | 14 | |
| Age | 25.2 ± 1.1 | 24.8 ± 1.0 | 0.8 |
| BMI | 22.6 ± 0.6 | 21.5 ± 0.4 | 0.2 |
| Sex (M/F) | 6/4 | 8/6 | 0.9 |
| Women in luteal phase | 1 | 1 | |
| Ethnicity (European/Asian/African) | 8/2/0 | 9/3/2 | |
| Habitual bed time | 01:03 ± 1:43 | 01:03 ± 1:17 | 0.9 |
| Habitual wake time | 07:57 ± 1:29 | 08:41 ± 01:19 | 0.2 |
| Sleep duration | 06:55 ± 1:01 | 07:38 ± 0:56 | 0.1 |
Subject characteristics split by PER3 VNTR genotype. Body-mass index (BMI). Mean ± standard deviation. P values refer to comparisons between genotypes.