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Table 2 Muscular and respiratory tests according to extubation outcome

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

Variables Extubation p
Success (n = 176) Failure (n = 51)
Handgrip strength (kg) 12 [6–20] 12 [8–20] 0.85
Muscular weakness n (%) 64 (38.6) 15 (33.3) 0.52
MRC score 48 [40–56] 47 [38–56] 0.67
MRC score subgroups n (%) 0.44
 < 36 35 (21.1) 7 (15.6)  
 36–47 44 (26.5) 16 (35.6)  
 ≥ 48 87 (52.1) 22 (48.9)  
Dominant arm abduction subgroups n (%) 0.82
 0° 8 (4.8) 2 (4.4)  
 0–45° 58 (34.9) 18 (40)  
 45–90° 100 (60.2) 25 (55.6)  
Maximal inspiratory pressure (cmH2O) 31 [17, 19–41] 32 [19–45] 0.92
Peak expiratory cough flow (L/min) 65 [47–82] 61 [50–77] 0.80
  1. Missing data n = 16 for handgrip, MRC score and dominant arm abduction (n = 10 and n = 6, respectively, in success and failure subgroups), n = 82 for maximal inspiratory pressure abduction (n = 62 and n = 20, respectively, in success and failure subgroups), n = 26 for peak expiratory cough flow (n = 17 and n = 9, respectively, in success and failure subgroups)
  2. MRC Medical Research Council