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Table 4 Imputation on missing data on triage level

From: Prehospital triage of patients diagnosed with perforated peptic ulcer or peptic ulcer bleeding: an observational study of patients calling 1-1-2

Unadjusted A-triage and E-triage
  Group Unadjusted, RR (95% CI) Complete Cases Unadjusted, RR (95% CI) Multiple imputation Unadjusted, RR (95% CI) Bootstrapping
A-triage (n = 7538) PPU/PUB 1 (ref.) 1 (ref.) 1 (ref.)
Respiratory Failure 1.10 (0.99–1.22) 1.22 (0.99–1.49) 1.18 (1.06–1.39)
Stroke 1.41 (1.27–1.56) 1.50 (1.21–1.87) 1.46 (1.29–1.67)
Trauma 1.32 (1.19–1.46) 1.42 (1.16–1.76) 1.40 (1.25–1.59)
Cardiac Chest Pain 1.47 (1.33–1.62) 1.58 (1.27–1.96) 1.53 (1.37–1.75)
Cardiac Arrest 1.46 (1.32–1.61) 1.56 (1.25–1.95) 1.53 (1.33–1.73)
E-triage (n = 7538) PPU/PUB 1 (ref.) 1 (ref.) 1 (ref.)
Respiratory Failure 0.59 (0.35–1.00) 0.57 (0.31–1.05) 0.65 (0.37–1.48)
Stroke 0.40 (0.22–0.71) 0.46 (0.24–0.88) 0.54 (0.32–1.11)
Trauma 0.11 (0.05–0.28) 0.15 (0.06–0.36) 0.16 (0.08–0.40)
Cardiac Chest pain 0.25 (0.13–0.47) 0.26 (0.12–0.56) 0.33 (0.12–0.85)
Cardiac Arrest 0.18 (0.08–0.39) 0.18 (0.07–0.45) 0.20 (0.12–0.30)
Adjusted A-triage and E-triage
  Group Adjusted, RR (95% CI) Complete Cases Adjusteda, RR (95% CI) Multiple Imputation Adjusteda, RR (95% CI) Bootstrapping
A-triage (n = 7538) PPU/PUB 1 (ref.) 1 (ref.) 1 (ref.)
Respiratory Failure 1.10 (0.99–1.22) 1.24 (1.01–1.52) 1.20 (1.08–1.42)
Stroke 1.41 (1.27–1.56) 1.50 (1.21–1.85) 1.45 (1.28–1.67)
Trauma 1.32 (1.19–1.46) 1.59 (1.29–1.97) 1.57 (1.39–1.79)
Cardiac Chest Pain 1.47 (1.33–1.62) 1.58 (1.28–1.97) 1.54 (1.37–1.78)
Cardiac Arrest 1.46 (1.32–1.61) 1.62 (1.29–2.02) 1.58 (1.38–1.81)
E-triage (n = 7538) PPU/PUB 1 (ref.) 1 (ref.) 1 (ref.)
Respiratory Failure 0.59 (0.35–1.00) 0.52 (0.28–0.95) 0.59 (0.33–1.33)
Stroke 0.40 (0.22–0.71) 0.48 (0.24–0.93) 0.56 (0.32–1.17)
Trauma 0.11 (0.05–0.28) 0.10 (0.04–0.25) 0.11 (0.06–0.27)
Cardiac Chest pain 0.25 (0.13–0.47) 0.25 (0.12–0.54) 0.33 (0.12–0.82)
Cardiac Arrest 0.18 (0.08–0.39) 0.17 (0.07–0.43) 0.19 (0.12–0.29)
  1. aTriage adjusted for age, sex, CCI score, and time of 1–1-2 call