approaching significanceP = 0.06
The increase in sleep efficiency (TST divided by total time in bed) in the melatonin phase was approaching significance (79.5 ± 12.5% vs. 62.8 ± 16.7%, P = 0.06) and wake (the time spent awake after sleep onset) was significantly lower in the melatonin phase (88.4 ± 61.2 vs. 165.9 ± 71.8 minutes, P = 0.05).