Table 4.

Effects of covariates on survival in patients on NIV: univariate analyses

Variable	Comparison	Survival benefit estimate	Survival benefit 95% CI	p Value
Age at symptom onset	Across IQR (69 cf. 54)	1.02	0.79 to 1.31	0.89
Log diagnostic delay	Across IQR (19 m versus 7 m)	1.14	0.91 to 1.43	0.24
Gender	Male cf. female	1.40	0.94 to 2.07	0.09
Riluzole	Yes cf. no	1.38	0.92 to 2.08	0.12

NIV, non-invasive ventilation.