Light treatment for seasonal Winter depression in African-American vs Caucasian outpatients

Table 2 Comparison of pretreatment and post-treatment depression scores

Variable	African-Americans	Caucasians	P-value1
Pre-treatment mood scores	(n = 51)	(n = 27)
SIGH-SAD, mean ± SD	33 (6.9)	31 (6.4)	0.22
BDI-II, mean ± SD	25 (10.9)	23.6 (8.4)	0.58
Post-treatment mood scores	(n = 41)	(n = 24)
SIGH-SAD, mean ± SD	9.31 (6.9)	6.79 (6.0)	0.15
BDI-II, mean ± SD	9 (7.9)	7.3 (7.4)	0.41

¹P-values from t-test compare the two groups on pre-treatment and post-treatment depression scores. SIGH-SAD: Structured Interview Guide for Hamilton-Seasonal Affective Disorder version; BDI-II: Beck Depression Inventory Second Edition.