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Table 3 GDS and HDRS Scores by Week by Light Condition Mean (SD) N

From: Bright green light treatment of depression for older adults [ISRCTN69400161]

Light Condition Bright Light Dim Light
Baseline 20.5 (5.19) 17 20.1 (3.98) 16
After Wake Treatment 16.1 (7.33) 17 18.5 (4.81) 16
Treatment week 1 19.4 (5.51) 16 19.5 (5.26) 14
Treatment week 2 15.5 (7.57) 15 15.6 (5.50) 16
Treatment week 3 13.3 (6.72) 16 15.9 (5.92) 16
Treatment week 4 12.1 (6.25) 17 14.0 (6.30) 16
Two-week follow-up 13.5 (7.53) 17 10.7 (6.89) 11
Four-week follow-up 12.4 (7.66) 16 10.3 (7.07) 10
3-Month follow-up 11.6 (7.59) 13 15.8 (6.94) 6
HDRS 17 Self Report – Baseline 19.1 (4.13) 17 17.0 (4.80) 16
HDRS 17 Self Report – Final 11.4 (3.94) 17 10.8 (5.01) 16
Blind HDRS 17 – Baseline 18.0 (4.87) 13 17.9 (6.34) 14
Blind HDRS 17 – Final 11.4 (5.11) 13 10.5 (6.73) 14