Table 4.

Multivariate analyses of independent risk factors for presenting multiple initial respiratory symptoms

Parameter	Odds ratio	95% Confidence interval	P-value
Smoking status
Former or Never	1.00
Current	1.36	1.07—1.73	0.011*
Tumor size(cm)
≤3	1.00
>3 Histological subtype	1.53	1.21—1.93	<0.001* 0.001*
Adenocarcinoma	1.00
Squamous cell	1.68	1.32—2.15	<0.001*
Small cell	1.46	0.69—3.05	0.321
Others	1.17	0. 67—2.04	0.575

*P<0.05