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Table 3 Sleep disturbances in patients (n = 497) and in the reference group within the total patients and patients with or without concurrent disease

From: Prevalence of sleep disturbances and long-term reduced health-related quality of life after critical care: a prospective multicenter cohort study

  Total patients Concurrent disease patients Previously healthy patients
  ICU patients Reference group P value ICU patients Reference group P value ICU patients Reference group P value
Difficulties in falling asleep          
   Never or <1 times/week 62% 87% <0.001 55% 81% <0.001 78% 94% <0.001
   From 1 to 2 days/week to daily or almost daily 38% 13%   45% 19%   22% 6%  
   Total (n) 472 5826   326 2955   146 2871  
Sleep quality during the past month          
   Neither good nor bad, good or very good 80% 88% <0.001 77% 81% 0.080 88% 95% 0.001
   Quite bad, poor or very poor 20% 12%   23% 19%   12% 5%  
   Total (n) 473 6047   326 3074   147 2973  
Sleep deficit          
   Need for sleep higher than habitual sleep 61% 55% 0.034 64% 59% 0.196 56% 51% 0.310
   Need for sleep equal or less to habitual sleep 39% 45%   36% 41%   44% 49%  
   Total (n) 279 5605   192 2825   88 2780  
  1. Data presented as the percentage of the intensive care unit (ICU) study group (n = 497) (responding at both 6 and 12 months) at the 6-month measure, Not all patients answered the questions.