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Table 1 Characteristics of adults admitted to ICU during weekday/daytime as compared to nights/weekends

From: Mortality associated with timing of admission to and discharge from ICU: a retrospective cohort study

Factor Monday to Friday (n = 2,721) 18:00-07:59 daily and anytime Saturday or Sunday (n = 4,659) P-value
Median (IQR) age years 64 (52-76) 62 (48-75) < 0.0001
Male gender 1073 (61%) 1832/4665 (61%) 0.92
Median (IQR) 39 (27-56) 41 (28-56) 0.0106
SAPS II    
Admit DFLST status 186 (7%) 269 (6%) 0.071
Median (IQR) pre-ICU LOS 1 (0-3) 0 (0-1) <0.0001
>2 days admit prior 990 (36%) 1101 (24%) <0.0001
Medical-surgery category    <0.001
   Medical 1967 (72%) 3763 (81%)  
   Non-scheduled surgery 287 (11%) 585 (13%)  
   Scheduled surgery 467 (17%) 311 (7%)  
Admitting surgery    <0.001
   Other ICU 153 (6%) 262 (6%)  
   Other ward 1364 (50%) 1609 (35%)  
   Home 22 (1%) 52 (1%)  
   ER 1100 (40%) 2525 (54%)  
   Other 82 (3%) 211 (5%)  
Ventilation    <0.001
   None 1143 (42%) 2177 (47%)  
   Non-invasive 274 (10%) 428 (9%)  
   Endotracheal 1304 (48%) 2054 (44%)  
Main diagnostic category    <0.001
   Respiratory 662 (24%) 1082 (23%)  
   Cardiovascular 375 (14%) 692 (15%)  
   Neuromuscular 330 (12%) 694 (15%)  
   Gastrointestional 344 (13%) 648 (14%)  
   Other surgery 405 (15%) 310 (7%)  
   Renal, metabolic,toxic 328 (8%) 761 (16%)  
   Infectious 227 (8%) 403 (9%)  
   Other 50 (2%) 69 (1%)  
Knaus co-morbidties    
   hepatic 176 (6%) 300 (6%) 0.96
   cardiovascular 339 (12%) 631 (14%) 0.19
   respiratory 363 (13%) 590 (13%) 0.41
   renal 173 (6%) 299 (6%) 0.96
   immune 409 (15%) 700 (15%) 1.00
  1. Decision to forego life sustaining therapy (DFLST)