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Table 1 Characteristics of patients in the study group (6 and 12 months), in the nonresponders/withdrawals at 12 months group, and in the reference group

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

  Study group (n = 497) Nonresponders/withdrawals group (n = 226) P valuea Reference group (n = 6093) P valueb
Sex (male/female) 274/223 136/90 0.23 2822/3271 <0.0001
Age (years) 52.4 (15.7) 52.5 (16.1) 0.97 46.4 (15.1) <0.0001
Marital status    0.09   0.006
   Married 327 (67) 130 (59)   4484 (74)  
   Single 135 (28) 79 (35)   1334 (22)  
   Widow/widower 27 (15) 13 (6)   274 (4)c  
Children at home < 19 years 116 (24) 40 (18) 0.08   
Born in Sweden 454 (92) 201 (89) 0.26 5569 (91) 0.74
Education      <0.0001
   Compulsory school 166 (34) 84 (38) 0.35 1785 (29)  
   High school/university 121 (25) 52 (23) 0.78 1371 (22)  
Employment before ICU stay    0.04   <0.0001
   Employed 237 (50) 103 (48)   3589 (59)  
   Retired 192 (41) 83 (39)   1145 (19)  
   Student 20 (4) 6 (3)   402 (7)  
   Other 21 (5) 23 (10)   957 (16)d  
6 months after ICU stay    0.31   
   Employed 201 (44) 70 (35)    
   Retired 206 (45) 101 (51)    
   Student 15 (3) 9 (4)    
   Other 36 (8) 20 (10)    
Sick leave before ICU stay 70 (14) 29 (13) 0.46   
   Reported sick <100% 13 (3) 8 (3)    
   Reported sick 100% 50 (10) 18 (3)    
6 months after ICU 121 (24) 59 (26) 0.70   
   Reported sick <100% 20 (4) 8 (3)    
   Reported sick 100% 94 (19) 48 (21)    
Concurrent diseasee 342 (69) 179 (79) 0.005 3095 (51) <0.0001
   Cancer 48 (10) 32 (18)    
   Diabetes 57 (11) 29 (16)    
   Cardiovascular 83 (17) 36 (20)    
   Gastrointestinal 50 (10) 25 (14)    
   Miscellaneous 322 (65) 168 (74)    
  1. Not all patients answered all questions. Data presented as n (%) of totals, except age as mean (standard deviation). Bold data is on significant level. aStudy group compared with nonresponders/withdrawals at 12 months (Fisher's exact test or Pearson chi-square test). bReference group compared with study group (Fisher's exact test or Pearson chi-square test). cIn public health survey, the category variable was other. dIncluding sick leave. ePatients can have more than one disease.