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Table 3 The median time spent in the living room between 10:00 and 15:00 for each group

From: Ambient bright light treatment improved proxy-rated sleep but not sleep measured by actigraphy in nursing home patients with dementia: a placebo-controlled randomised trial

  Week 8 Week 16 Week 24
Mean (SD) Median (25th–75th) Mean (SD) Median (25th–75th) Mean (SD) Median (25th–75th)
Intervention 3.2 (1.8) 3.3 (1.8–5.0) 3.4 (1.8) 4.0 (2.0–5.0) 3.7 (1.6) 5.0 (2.0–5.0)
Control 3.1 (1.3) 3.0 (2.0–4.0) 2.9 (1.6) 3.0 (1.5–5.0) 2.9 (1.7) 3.0 (2.0–5.0)
p-value .560 .482 .077
  1. Note: Differences between groups tested with Mann-Whitney U test. Time in hours