Comparison of extended segmentectomy with traditional segmentectomy for stage I lung cancer

Table 4 Results of generalized linear model on resection margin

Parameter		Bivariable analysis (crude)				Multivariable analysis (adjusted)
Parameter		β	SE	95% CI	P-value	β	SE	95% CI	P-value
Surgical type	iVATS extended segmentectomy	3.787	1.670	0.514 to 7.061	0.023	4.636	1.647	1.408 to 7.865	0.005
	Traditional segmentectomy (ref)	0.000				0.000
Age		0.055	0.086	− 0.113 to 0.223	0.522	0.169	0.084	0.005 to 0.333	0.043
Location	Left lower lobe	2.994	2.485	− 1.877 to 7.865	0.228	6.132	2.399	1.431 to 10.833	0.011
	Left upper lobe	1.552	2.091	− 2.546 to 5.650	0.458	3.299	1.961	− 0.545 to 7.143	0.093
	Right lower lobe	3.860	2.442	− 0.927 to 8.646	0.114	5.568	2.307	1.047 to 10.090	0.016
	Right middle lobe	− 6.690	6.505	− 19.441 to 6.060	0.304	− 6.261	5.948	− 17.919 to 5.398	0.293
	Right upper lobe (ref)	0.000				0.000
FEV1		0.037	0.052	− 0.065 to 0.138	0.481
Histology	Others	− 14.541	6.383	− 27.051 to − 2.030	0.023	− 20.697	6.923	− 34.267 to − 7.128	0.003
	Squamous cell carcinoma	− 4.541	5.235	− 14.801 to 5.720	0.386	− 7.456	5.090	− 17.433 to 2.521	0.143
	Adenocarcinoma (ref)	0.000				0.000
T stage	1b	− 2.090	1.696	− 5.413 to 1.234	0.218	− 3.429	1.662	− 6.687 to − 0.171	0.039
	1a (ref)	0.000				0.000
Lymph invasion	Yes	0.121	3.576	− 6.887 to 7.128	0.973	7.977	3.982	0.173 to 15.782	0.045
	No (ref)	0.000				0.000

β, regression coefficient; CI, confidence interval; Lymph invasion, lymphovascular invasion

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