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Table 3 Characteristics of patients according to first weaning trial outcome

From: Handgrip strength to predict extubation outcome: a prospective multicenter trial

Variables First weaning trial p
Success (n = 171) Failure (n = 60)
Age (y) 64 [52–74] 68 [58–77] 0.01
BMI (kg/m2) 28.2 [22.8–33] 27.9 [23.8–33.9] 0.89
Gender (M/F) 103/69 36/25 0.90
SAPS II 52 [40–65] 54 [45–72] 0.16
Sepsis n (%) 95 (55.2) 44 (72.1) 0.021
Baseline respiratory disease n (%) 50 (29.1) 24 (39.3) 0.14
Baseline cardiac disease n (%) 57 (33.1) 31 (50.8) 0.015
MRC score 47 [37–55] 43 [33–52] 0.028
MRC score subgroup n (%) 0.19
 < 36 37 (21.6) 18 (30)  
 36–47 49 (28.5) 20 (33.3)  
 ≥ 48 85 (49.7) 22 (36.7)  
Handgrip strength (kg) 12 [5–18] 8.5 [2.5–16] 0.057
Dominant arm abduction subgroup n (%) 0.47
 0° 11 (6.4) 6 (10)  
 0–45° 58 (33.9) 23 (38.3)  
 45–90° 102 (59.7) 31 (51.7)  
Maximal inspiratory pressure (cmH2O) 30 [17, 20–41] 27 [16–37] 0.41
Peak expiratory cough flow (L/min) 62 [47–80] 55 [31–69] 0.006
  1. BMI body mass index, SAPS Simplified Acute Physiology Score, MRC Medical Research Council