Ageing and long-term smoking affects KL-6 levels in the lung, induced sputum and plasma

BMC Pulmonary Medicine

Table 5 Linear and multivariate analysis of relationship between the induced sputum levels of KL-6 and clinical parameters

Variable		Regression coefficient	Standard error	P-value
Linear Regression	Age	4.747	2.360	0.049*
	BMI	5.971	5.427	0.276
	Pack-year	2.921	0.942	0.003**
	FEV₁/FVC	-3.034	1.415	0.037*
Multi Regression	Age	1.506	2.713	0.581
	Pack-year	2.566	1.409	0.075
	FEV₁/FVC	-0.056	1.940	0.977

BMI, body mass index; FEV₁, Forced expiratory volume in one second; FVC, Forced vital capacity

ISSN: 1471-2466