TABLE 3

Multivariate analysis (Cox regression) of possible risk factors affecting survival in wedge resection and radiofrequency ablation (RFA) patients

Risk factor	Wedge resection			RFA
Risk factor	p-value	OR	95% CI	p-value	OR	95% CI
Age	0.150	1.076	0.974–1.188	0.316	1.03	0.967–1.108
Sex	0.902	1.005	0.923–1.096	0.321	0.486	0.197–1.162
Performance status	0.811	1.018	0.880–1.177	0.224	0.965	0.912–1.022
FEV₁ % predicted	0.890	1.010	0.882–1.155	0.095	1.025	0.675–1.044
FVC % predicted	0.783	1.221	0.652–1.332	0.632	1.432	0.756–1.551
BMI	0.549	1.065	0.867–1.307	0.869	0.989	0.866–1.129
ACE-27	0.702	1.268	0.376–4.283	0.334	1.558	0.634–3.825
Histology	0.712	0.787	0.220–2.816	0.103	0.479	0.198–1.161
T-stage	0.577	1.532	0.342–6.852	0.042	5.138	1.063–24.839
Surgical approach	0.856	1.002	0.947–1.326	NA	NA	NA
Visceral pleural invasion	0.744	1.121	0.874–1.206	NA	NA	NA

OR: odds ratio; 95% CI: 95% confidential interval; FEV₁: forced expiratory volume in 1 s; FVC: forced vital capacity; BMI: body mass index; ACE-27: Adult Co-Morbidity Evaluation scoring system; NA: not applicable.