Table 2.
Mean differences in different sections of time.
| Variables | 12:00 am-4:00 am | 4:00 am-8:00 am | 8:00 am-12:00 pm | 12:00 pm-4:00 pm | 4:00 pm-8:00 pm | 8:00 pm-12:00 am | |
| Ecological momentary assessment | |||||||
|
|
Nondepression | —a | 6.4 | 6.6 | 6.6 | 6.6 | — |
|
|
Depression | — | 5.0 | 5.2 | 5.2 | 5.1 | — |
|
|
Difference | — | −1.4 | −1.4 | −1.4 | −1.5 | — |
|
|
P value | — | .02 | .009 | .01 | .005 | — |
| Activity | |||||||
|
|
Nondepression | 16.4 | 78.5 | 141.2 | 133.0 | 120.1 | 54.1 |
|
|
Depression | 11.1 | 48.1 | 107.1 | 99.4 | 94.8 | 44.1 |
|
|
Difference | −5.3 | −30.4 | −34.1 | −33.6 | −25.3 | −10.0 |
|
|
P value | .36 | .02 | .01 | .005 | .06 | .20 |
| White light | |||||||
|
|
Nondepression | 1.0 | 14.5 | 110.3 | 137.4 | 50.7 | 10.4 |
|
|
Depression | 0.7 | 18.1 | 196.3 | 161.6 | 91.7 | 20.6 |
|
|
Difference | −0.3 | 3.6 | 86.0 | 24.2 | 41.0 | 10.2 |
|
|
P value | .51 | .42 | .02 | .08 | .005 | .10 |
| Red light | |||||||
|
|
Nondepression | 0.6 | 17.1 | 150.0 | 181.7 | 64.2 | 5.8 |
|
|
Depression | 0.6 | 20.9 | 269.6 | 204.9 | 112.1 | 13.4 |
|
|
Difference | 0.0 | 3.8 | 119.6 | 23.2 | 47.9 | 7.6 |
|
|
P value | .79 | .43 | .049 | .12 | .02 | .07 |
| Green light | |||||||
| Nondepression | 1.1 | 17.0 | 125.0 | 154.2 | 54.3 | 8.9 | |
|
|
Depression | 1.4 | 21.4 | 250.2 | 194.7 | 103.0 | 28.5 |
|
|
Difference | 0.3 | 4.4 | 125.2 | 40.5 | 48.7 | 19.6 |
|
|
P value | .97 | .31 | .01 | .05 | .003 | .09 |
| Blue light | |||||||
|
|
Nondepression | 0.4 | 10.3 | 81.9 | 101.5 | 34.7 | 4.7 |
|
|
Depression | 0.4 | 13.7 | 154.6 | 126.2 | 64.8 | 12.3 |
|
|
Difference | 0.0 | 3.4 | 72.7 | 24.7 | 30.1 | 7.6 |
|
|
P value | .77 | .33 | .01 | .07 | .006 | .08 |
aNot applicable.