Skip to main content

Table 3 Subjective assessment of insomnia: results at baseline and after 1 night of melatonin or placebo treatment (N = 86)

From: Efficacy and hypnotic effects of melatonin in shift-work nurses: double-blind, placebo-controlled crossover trial

   Mean SD P(vs.baselinea) P(vs.placeboa) Fb Pb
Difficulty falling asleep Melatonin 1.63 0.61 < 0.05 < 0.05 4.5 0.01
  Placebo 2.53 0.62 > 0.05    
  Baseline 2.67 0.80     
Difficulty staying asleep Melatonin 2.32 0.83 > 0.05 > 0.05 0.71 NS
  Placebo 2.31 0.69 > 0.05    
  Baseline 2.48 1.11     
Problem waking up too early Melatonin 2.26 0.81 > 0.05 > 0.05 0.42 NS
  Placebo 2.40 0.74 > 0.05    
  Baseline 2.39 1.29     
Sleep quality Melatonin 2.58 0.76 < 0.05 < 0.05 1.2 0.02
  Placebo 2.69 0.67 > 0.05    
  Baseline 3.16 0.92     
  1. a p values for Tukey post hoc analysis.
  2. b Overall test for differences