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Table 8 Acrophase Changes (Minutes) by Light Condition and Treatment Timing: Mean (SD) N

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

Acrophase Difference (minutes) Baseline minus Final

Morning

Evening

 

Bright

Dim

Bright

Dim

Illumination

80.69 (69.14) 9

1.53 (39.72) 14

-41.99 (63.48) 11

-28.77 (56.96) 7

Activity

25.84 (40.35) 8

-32.42 (60.00) 13

-0.96 (34.46) 11

-40.88 (48.03) 7

Sleep

39.59 (34.81) 9

-25.90 (42.96) 12

-3.80 (34.74) 11

-24.86 (48.32) 7

ANOVA Sig. (p)

 

Illumination

Activity

Sleep

Treatment Condition

 

0.485

0.003

0.001

Treatment Time

 

0.001

0.485

0.243

Condition by Time

 

0.001

0.128

0.054

  1. Note: Positive change is earlier, negative change is later, at the end of treatment.