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Trouble concentrating or thinking clearly at baseline, week 7 and week 14 by group. Mean score derived from the Columbia Scale according to response to the second question, "Over the last 3 days how much have you been bothered by trouble concentrating or thinking clearly? Possible answers and scoring: 1 = not at all, 2 = a little bit, 3 = moderately, 4 = quite a bit, 5 = extremely. |
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| Time point |
Control (n = 23) |
Intervention (n = 46) |
|
|
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| mean score (SD) |
mean score (SD) |
|
|
|
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| Baseline |
2.5 (1.1) |
2.9 (1.2) |
| Week 7 |
2.6 (1.1) |
1.9 (0.9) |
| Study end (Week 14) |
2.5 (0.9) |
1.8 (0.9) |
Mills et al. Journal of Circadian Rhythms 2007 5:2 doi:10.1186/1740-3391-5-2 |
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