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Table 3 GDS Scores by Week by Light Condition and Treatment Timing: Mean (SD) N

From: Bright light treatment of depression for older adults [ISRCTN55452501]

Time Light Morning Mid-day Evening Total
  Bright Dim Bright Dim Bright Dim Bright Dim
Baseline start 21.23 (6.08) 13 21.00 (4.47) 15 18.73 (2.91) 15 19.50 (4.43) 16 18.54 (5.63) 13 17.00 (4.27) 16 19.46 (5.01) 41 19.50 (4.56) 40
End of baseline week 21.77 (5.85) 13 20.33 (4.53) 15 18.93 (3.41) 15 19.63 (4.83) 16 18.62 (5.61) 13 17.89 (5.09) 9 19.73 (5.07) 41 19.50 (4.74) 40
After wake therapy 21.67 (5.68) 9 19.43 (6.73) 14 18.00 (5.31) 12 18.00 (5.85) 13 16.60 (5.97) 10 17.14 (4.14) 7 18.61 (5.82) 31 18.41 (5.85) 34
Treatment Week 1 20.00 (5.55) 13 19.33 (7.69) 15 18.20 (4.06) 15 16.94 (3.99) 16 15.08 (8.41) 13 15.11 (5.11) 9 17.78 (6.35) 41 17.43 (5.95) 40
Treatment Week 2 20.08 (6.22) 13 18.60 (7.60) 15 16.21 (5.69) 14 14.38 (5.30) 16 14.75 (8.07) 12 12.33 (5.45) 9 17.05 (6.87) 39 15.50 (6.65) 40
Treatment Week 3 18.85 (6.50) 13 18.50 (6.44) 14 15.00 (5.41) 15 14.81 (5.97) 16 13.23 (6.66) 13 13.00 (7.05) 9 15.66 (6.45) 41 15.72 (6.61) 39
Treatment Week 4 17.38 (6.96) 13 18.67 (7.79) 15 14.07 (6.06) 15 13.81 (5.60) 16 11.77 (7.00) 13 12.22 (6.53) 9 14.39 (6.88) 41 15.28 (7.07) 40
Two-Week follow-up 16.25 (7.96) 12 16.00 (7.72) 11 13.69 (5.41) 13 11.85 (5.80) 14 11.80 (6.66) 10 12.13 (8.41) 8 14.03 (6.77) 35 13.30 (7.18) 33
Four-Week follow-up 17.25 (6.54) 8 14.00 (9.03) 9 12.77 (5.69) 13 13.08 (5.27) 13 13.55 (6.25) 11 10.25 (8.40) 8 14.16 (6.18) 32 12.60 (7.29) 30
3-Month follow-up 14.00 (9.47) 8 18.14 (9.58) 7 15.91 (5.26) 11 11.21 (5.74) 14 16.29 (6.97) 7 11.60 (9.63) 5 15.42 (6.99) 26 13.15 (7.97) 26