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Table 1 Baseline characteristics and patient status at randomisation

From: A randomized controlled proof-of-concept trial of early sedation management using Responsiveness Index monitoring in mechanically ventilated critically ill patients

Baseline variables

Intervention (n = 36)

Control (n = 38)

Age, years, median

60

59

(1st, 3rd quartile; min–max)

(44, 69; 25–85)

(43, 72; 27–80)

Sex, male/female

21/15

26/12

Primary diagnosis, number of patients

 Cardiovascular

8

5

 Respiratory

3

9

 Gastrointestinal

14

15

 Renal

0

1

 Trauma

3

1

 Other

8

7

APACHE II score, median

20

23

(1st, 3rd quartile; min–max)

(11, 24; 0–31)

(17, 26; 0–38)

Charlson comorbidity index, median

1

1

(1st, 3rd quartile; min–max)

(0, 2; 0–5)

(0, 2; 0–7)

SOFA score for first 24 hours, median

7

8

(1st, 3rd quartile; min–max)

(5, 11; 2–16)

(5, 9; 1–16)

Time, hours from intubation to start of monitoring, median

4.0

4.9

(1st, 3rd quartile; min–max)

(2.1, 6.2; 1.0–12.0)

(3.5, 7.7; 0.7– 1.8)

RI at start of intervention period, median

16

18

(1st, 3rd quartile; min–max)

(0, 55; 0–100)

(0, 42; 0–100)

 Red, n (%)

19 (54.3 %)

20 (54.1 %)

 Amber, n (%)

5 (14.3 %)

8 (21.6 %)

 Green, n (%)

11 (31.4 %)

9 (24.3 %)

 No value, n (%)a

1 (2.8 %)

1 (2.6 %)

RASS score at start of intervention period, median

−3

−4

(1st, 3rd quartile; min to max)

(−4, −2; −5 to +0)

(−4, −3; −5 to +2)

Total alfentanil dose, mg, prior to monitoring, median

1.75

3.00

(1st, 3rd quartile; min–max)

(0.75, 5.25; 0.00–14.00)

(1.00, 7.50; 0.00–17.50)

  1. aOne patient in each group had a long delay in commencing Responsiveness Index (RI) monitoring by clinical staff after randomisation. These two patients were not given a baseline RI value, and were excluded from the subgroup analysis of patients with RI <20 at baseline, as the value was uncertain at the start of the study. APACHE acute physiology and chronic health evaluation, SOFA sequential organ failure assessment, RASS Richmond agitation-sedation scale