Table 3. Analysis of the factors associated with recovery of pulmonary function at 12 months postoperatively.

Factors	n	VC			FEV1
		RR (%)	P		RR (%)	P
Sex			0.323			0.569
Male	16	99.7			97.9
Female	13	97.6			96.5
Age			0.079			0.035*
≥70	13	96.7			94.5
<70	16	100.0			99.5
Smoking history			0.160			0.741
Yes	17	97.5			96.9
No	12	100.6			97.8
Respiratory comorbidity			0.646			0.713
Yes	15	98.3			97.7
No	14	99.3			96.8
Past thoracotomy			0.798			0.656
Yes	6	99.3			98.3
No	23	98.6			97.0
Lobe			0.500			0.070
Upper or middle	16	98.1			95.3
Lower	13	99.6			99.6
Size of resected lesion			0.027*			0.715
≥20 mm	11	101.7			96.7
<20 mm	18	97.0			97.6
Preoperative %VC			0.824			0.920
≥80%	23	98.6			97.2
<80%	6	99.2			97.5
Preoperative %FEV1			0.093			0.888
≥80%	18	100.1			97.4
<80%	11	96.5			97.0
Number of resected lesions			0.831			0.754
≥2	5	99.3			96.4
1	24	98.7			97.4
Number of staplers used			0.775			0.312
≥4	18	98.5			96.3
1–3	11	99.2			98.8
Absorbable reinforcement sheet			0.664			0.355
Yes	14	99.3			98.4
No	15	98.3			96.1
Fibrin sealant			0.102			0.827
Yes	8	96.0			97.7
No	21	99.8			97.0

*, indicates a significant difference. VC, vital capacity; FEV₁, forced expiratory volume in one second; RR, recovery ratio.