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Table 7 Timing of Saliva Melatonin and Urinary aMT6s at Baseline Mean (SD) N

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

Times are in decimal hours

Saliva Melatonin

Depressed

Healthy Controls

Sig. (T-test, p)

Onset

21.48 (1.67) 28

20.36 (1.98) 22

0.16

Offset

8.76 (2.14) 32

8.78 (1.22) 16

0.873* unequal variance

Duration

11.19 (1.64) 25

11.75 (1.75) 15

0.574

Urinary aMT6s

   

Onset

23.95 (3.15) 48

22.22 (2.44) 28

0.015

Offset

9.72 (2.82) 48

8.70 (2.02) 28

0.099

Duration

9.75 (2.48) 48

10.48 (2.21) 28

0.201

Acrophase

4.25 (2.56) 49

3.36 (1.75) 28

0.107

Mesor (ng/hour)

652.12 (911.31) 49

485.40 (377.80) 28

0.36

Horne-Östberg

54.75 (11.45) 81

67.65 (9.38) 23

< 0.001