Endobronchial valves for emphysema and persistent air-leak: 10-year experience in an Asian country

BMC Pulmonary Medicine

Table 4 Cox proportional hazard regression analysis for mortality

	Univariate analysis			Multivariate analysis
	HR	95% CI	P	aHR	95% CI	P
Age, years	1.022	0.974–1.073	0.378
Female sex	3.194	0.725–14.06	0.125	1.572	0.295–8.381	0.597
Body mass index	0.797	0.679–0.935	0.005	0.749	0.595–0.944	0.014
FEV₁, % predicted	0.201	0.030–1.365	0.101	0.523	0.092–2.989	0.466
MMRC grade	1.291	0.612–2.722	0.503
Radiographic reduction in lung volume by visual estimation	0.282	0.010–0.816	0.020	0.156	0.038–0.650	0.010

Abbreviations: FEV₁ Forced expiratory volume in 1 s, MMRC Modified Medical Research Council, HR Hazard ratio, CI Confidence interval, aHR Adjusted hazard ratio

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