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Table 1 Characteristics of ICU patients, Aarhus University Hospital, 1999 to 2005

From: Preadmission beta-blocker use and 30-day mortality among patients in intensive care: a cohort study

  Overall Propensity-score-matched cohorts
  No current use of beta-blockers Current use of beta-blockers No current use of beta-blockers Current use of beta-blockers
  N (%) N (%) N (%) N (%)
Overall 6,531 (80.8%) 1,556 (19.2%) 1,556 (0%) 1,556 (100%)
Age group     
46 to 59 2,100 (32.2%) 344 (22.1%) 307 (19.7%) 344 (22.1%)
60 to 75 2,880 (44.1%) 740 (47.6%) 790 (50.7%) 740 (47.6%)
75+ 1,551 (23.7%) 472 (30.3%) 459 (29.5%) 472 (30.3%)
Gender     
Female 2,796 (42.8%) 598 (38.4%) 623 (40.0%) 598 (38.4%)
Male 3,735 (57.1%) 958 (61.6%) 933 (60.0%) 958 (61.6%)
Diagnostic category     
Infectious disease 152 (2.3%) 37 (2.4%) 22 (1.4%) 37 (2.4%)
Cancer 1,200 (18.4%) 143 (9.2%) 114 (7.3%) 143 (9.2%)
Diabetes 88 (1.4%) 18 (1.2%) 14 (0.8%) 18 (1.2%)
Cardiovascular 1,812 (27.7%) 722 (46.4%) 756 (48.6%) 722 (46.4%)
Respiratory 753 (11.5%) 117 (7.5%) 103 (6.6%) 117 (7.5%)
Gastrointestinal 797 (12.2%) 176 (11.3%) 196 (12.6%) 176 (11.3%)
Trauma/poisoning 834 (12.8%) 137 (8.8%) 160 (10.3%) 137 (8.8%)
Other 895 (13.7%) 206 (13.2%) 191 (12.3%) 206 (13.2%)
Surgery within 7 days     
No surgery 2,829 (43.3%) 611 (39.3%) 592 (38.1%) 611 (39.7%)
Surgery 3,702 (56.7%) 945 (60.7%) 964 (62.0%) 945 (60.7%)
Comorbidity     
Charlson score     
0 1,880 (28.8%) 237 (15.2%) 224 (14.4%) 237 (15.2%)
1 to 2 2,740 (42.0%) 649 (41.7%) 666 (42.8%) 649 (41.7%)
3 + 1,911 (29.3%) 670 (43.1%) 666 (42.8%) 670 (43.1%)
Alcoholism-related disorders 696 (10.7%) 160 (10.3%) 150 (9.6%) 160 (10.3%)
Preadmission drug use ACE-inhibitors 954 (14.6%) 633 (40.7%) 644 (41.4%) 633 (40.7%)
Statins 415 (6.4%) 469 (30.1%) 436 (28.0%) 469 (30.1%)
Low-dose aspirin 477 (7.3%) 336 (21.6%) 311 (20.0%) 366 (21.6%)
Marital status     
Married 2,729 (41.8%) 671 (43.1%) 652 (41.9%) 671 (43.1%)
Never married 476 (7.3%) 91 (5.7%) 88 (5.7%) 91 (5.9%)
Divorced 665 (10.2%) 128 (8.2%) 129 (8.3%) 128 (8.2%)
Widowed 910 (13.4%) 246 (15.8%) 243 (15.6%) 246 (15.8%)
Unknown 1,751 (26.8%) 420 (27.0%) 444 (28.5%) 420 (27.0%)
Laboratory data*     
Hemoglobin     
Low 3,049 (47.7%) 805 (51.8%) 771 (49.6%) 805 (51.7%)
High 3482 (53.4%) 751 (48.2%) 785 (50.4%) 751 (48.3%)
Leukocytes     
Low 3,244 (49.7%) 787 (50.6%) 737 (47.4%) 787 (50.6%)
High 3,287 (50.3%) 769 (49.4%) 819 (52.6%) 769 (49.4%)
C-reactive protein     
Low 3,318 (50.8%) 723 (46.8%) 703 (45.2%) 723 (46.8%)
High 3,213 (49.2%) 833 (53.2%) 453 (54.8%) 833 (53.2%)
Creatinine     
Low 3,458 (53.0%) 577 (37.1%) 645 (41.5%) 577 (37.1%)
High 3,073 (47.1%) 979 (62.9%) 911 (58.6%) 979 (62.9%)
  1. *Laboratory data were categorized into two groups based on median values.