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Table 4 Characteristics of patients with and without complete pain scores

From: Prehospital intravenous fentanyl administered by ambulance personnel: a cluster-randomised comparison of two treatment protocols

Treatment protocol

Patients with missing pain scores

Patients with complete pain scores

Standard (2 μg/kg)

(n = 714)

Liberal (3 μg/kg)

(n = 598)

Standard (2 μg/kg)

(n = 1884)

Liberal (3 μg/kg)

(n = 2088)

Age, years (95% CI)

59.5 (57.7–61.2)

60.7 (58.7–62.7)

55.1 (54.1–56.1)

55.8 (54.8–56.7)

Male sex, % (95% CI)

43.7 (40.0–47.4)

45.8 (41.7–49.9)

46.0 (43.7–48.3)

48.8 (46.6–50.9)

CCI score, % (95% CI)

 0

55.2 (51.4–58.9)

52.0 (47.9–56.1)

61.4 (59.1–63.6)

58.4 (56.2–60.5)

 1

17.6 (14.9–20.6)

16.7 (13.8–20.0)

13.9 (12.3–15.5)

14.6 (13.1–16.1)

 2

9.4 (7.3–11.8)

11.4 (8.9–14.2)

10.2 (8.9–11.7)

10.7 (9.5–12.2)

 3+

17.8 (15.0–20.8)

19.9 (16.8–23.3)

14.5 (13.0–16.2)

16.3 (14.8–18.0)

Time in ambulance (minutes), median (IQR):

44 (32–59)

48 (36–61)

47 (35–62)

47 (36–61)

Cum. dose (μg) fentanyl, mean (95% CI)

96.7 (92.3–101.0)

99.3 (94.6–104.0)

117.9 (114.9–120.9)

122.9 (119.9–125.9)

Initial NRS scorea (mean, 95% CI):

6.52 (6.24–6.79)

6.21 (5.91–6.51)

7.59 (7.50–7.67)

7.45 (7.36–7.54)

  1. Abbreviations: CCI Charlson Comorbidity Index, Cum. cumulative, NRS numeric rating scale
  2. aGiven for the patients with an initial pain score but not a subsequent pain score at hospital arrival, which accounts for 307 patients in the standard group and 292 in the liberal group