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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