Table 3.  Correlation between MRC-SS at ICU discharge and clinical outcomes at 18-month follow-up.

Measurement	Variable	r	P value
SF-36
	PF	0.47	0.015
	RP	0.56	0.003
	BP	0.65	<0.001
	GH	0.33	0.103
	VT	0.36	0.073
	SF	0.67	<0.001
	RE	0.40	0.044
	MH	0.33	0.105
	PCS	0.61	<0.001
	MCS	0.32	0.108
Physical function
	MRC-SS	0.57	0.003
	GS (nv)	0.66	<0.001
	6MWD (nv)	0.41	0.043