Table 5.

Receiver Operating Characteristic Analysis for Key Respiratory Muscle Strength Parameters up to 3 Years of Follow-up for Ventilation-Free Survival: Invasive Respiratory Muscle Strength Parameters

	Twitch Trans-diaphragmatic Pressure (cm H2O)				Sniff Trans-diaphragmatic Pressure (cm H2O)
Projected Time (mo)	Cutoff	AUC	Sensitivity	Specificity	Cutoff	AUC	Sensitivity	Specificity
3	9.8	0.913	0.78	0.96	47.1	0.926	0.74	0.96
6	17.0	0.919	0.60	0.97	47.1	0.951	0.82	0.97
9	17.0	0.962	0.69	0.97	55.0	0.976	0.85	0.97
12	18.6	0.943	0.70	0.98	77.2	0.963	0.65	0.98
15	26.1	0.943	0.47	0.98	89.0	0.950	0.60	0.98
18	26.1	0.938	0.52	0.98	89.0	0.952	0.67	0.98
24	28.4	0.922	0.45	0.98	103.0	0.933	0.59	0.98
36	28.4	0.958	0.77	0.98	108.5	0.978	0.85	0.98

Definition of abbreviation: AUC = area under the curve.

Data for the maximal static expiratory mouth pressure are shown in Table E2.