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Table 1 Patient characteristics

From: Adverse event reporting in adult intensive care units and the impact of a multifaceted intervention on drug-related adverse events

Variable First 12 months Last 12 months Whole study period
No. of patients 3111 3293 6404
Age (yr), mean ± SD 64.6 ± 17.5 63.2 ± 18.2 63.8 ± 17.9
Male sex, n (%) 1743 (56) 1975 (60) 3718 (58)
SAPS II at admission, mean ± SD 34.2 ± 17.3 36.8 ± 17.8 35.5 ± 17.6
Type of admission, n (%)    
  Medical 2180 (70) 2173 (66) 4353 (68)
  Scheduled surgery 465 (15) 590 (18) 1055 (16.5)
  Unscheduled surgery 466 (15) 530 (17) 996 (15.5)
Principal reason for admission to unit, n (%)    
  Cardiovascular disorders 872 (28) 985 (30) 1857 (29)
  Respiratory disorders 531 (17) 461 (14) 992 (15.5)
  Neurological disorders 373 (12) 421 (12.8) 794 (12.4)
  Gastrointestinal disorders 292 (9.4) 336 (10.2) 628 (9.8)
  Trauma 311 (10) 290 (8.8) 601 (9.4)
  Intoxication 155 (5) 165 (5) 320 (5)
  Metabolic disorders 124 (4) 132 (4) 256 (4)
  Other 452 (14.5) 504 (15.3) 956 (14.9)
Length of ICU stay, days    
  Mean ± SD 2.8 ± 5.3 2.9 ± 5.2 2.8 ± 5.3
  Median (25th percentile, 75th percentile) 1.4 (1.0, 3) 1.1(0.8, 2.5) 1.2 (0.8, 2.7)
ICU mortality, n (%) 182 (5.8) 176 (5.3) 358 (5.6)
  1. Data are presented for the pre-implementation period (first 12 months) for the post-implementation period (last 12 months), and for the whole study period (24 months). ICU, intensive care unit; SAPS, simplified acute physiology score; SD, standard deviation.