Table 1

Demographic and clinical characteristics of participants

Group, mean (SD)*
CharacteristicBright light
n = 16		Dim light
n = 16
Age, yr21.9 (2.6)24.2 (6.1)
Body mass index23.1 (2.3)22.3 (2.7)
Current alcohol use, drinks/wk†5.1 (2.7)2.0 (2.0)
BDI score3.3 (3.7)3.0 (3.3)
SPAQ: Global Seasonality Score10.4 (2.2)10.8 (2.8)
Occupation, % student50.068.8
Bed time, hh:mm23:32 (0:54)00:00 (0:42)
Wake time, hh:mm8:10 (1:21)8:32 (0:35)

  • BDI = Beck Depression Inventory (36); SD = standard deviation; SPAQ = seasonal pattern assessment questionnaire. (34)

  • ↵* Unless otherwise indicated.

  • ↵† t30 = 3.75, p < 0.001.