Handgrip strength to predict extubation outcome: a prospective multicenter trial

Annals of Intensive Care

Table 2 Muscular and respiratory tests according to extubation outcome

Variables	Extubation		p
Variables	Success (n = 176)	Failure (n = 51)	p
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

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)
MRC Medical Research Council