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Table 1 Baseline characteristics for three emergency populations*

From: Systolic blood pressure and short-term mortality in the emergency department and prehospital setting: a hospital-based cohort study

  Emergency dep. Ambulance MECU P value
All patients, n 112,727 15,862 12,270  
Male, n (%) 59,523 (53) 7,778 (49) 7,028 (57) <0.001
Essential hypertension, n (%) 26,592 (24) 7,057 (46) 5,292 (43) <0.001
Charlson Comorbidity Index, n (%)     <0.001
0 83,068 (74) 8,204 (52) 6,595 (54)  
1 - 2 22,379 (20) 4,949 (31) 3,655 (30)  
>2 7,280 (7) 2,709 (17) 2,020 (17)  
Age, median [25th-75th percentile] 49 [30-69] 64 [44-78] 60 [42-74] <0.001
Systolic blood pressure, mean ± s.d. 148 ± 28 145 ± 28 141 ± 31 <0.001
Diastolic blood pressure, mean ± s.d. 85 ± 16 84 ± 18 84 ± 20 <0.001
Heart rate, mean ± s.d. 84 ± 19 87 ± 20 92 ± 25 <0.001
7-day mortality, n (%) 2,065 (1.8) 356 (2.2) 703 (5.7) <0.001
30-day mortality, n (%) 3,503 (3.1) 789 (5.0) 1,063 (8.7) <0.001
  1. *Values expressed as total number (fraction), medians [25th percentile to 75th percentile], or mean ± standard deviation (s.d.), as appropriate. Chi-squared test for categorical variables and Kruskal-Wallis test for continuous variables. MECU, mobile emergency care unit.