Table 2.

Multivariable patient-specific predictors of limited resection^*

Patient Characteristic	OR (95% CI)	P†
Insurance (vs private)		.02
Medicare or Medicaid	1.65 (1.00 to 2.75)
Military-based insurance	1.71 (0.67 to 4.44)
None, other or unknown	2.70 (1.42 to 5.13)
Education (vs less than high school)		.20
High school diploma	1.06 (0.62 to 1.83)
College diploma or more	1.78 (0.94 to 3.40)
Lung disease (vs none)‡		<.001
Mild	1.20 (0.76 to 1.89)
Moderate	2.58 (1.41 to 4.73)
Severe	5.39 (2.67 to 10.88)
Heart failure	1.91 (0.88 to 4.17)	.10
Stroke	1.89 (1.00 to 3.55)	.049
Obesity§	2.39 (0.99 to 5.76)	.05
Tumor size, per cm increase	0.82 (0.72 to 0.94)	.004

^*CI = confidence interval; FEV = forced expiratory volume; OR = Odds ratio.

^†Values are based on logistic regression using all variables with P less than .1 on univariate screen by two-sided Fisher exact tests for categorical variables and two-sided Wilcoxon tests for continuous non-normal variables, excluding collinear terms.

^‡Severity of lung disease was categorized as mild if the patient carried a diagnosis of restricted lung disease or chronic obstructive pulmonary disease that responded to treatment, recent dyspnea with activity, or recent FEV1 in the range of 66%–80%. Moderate lung disease was defined as lung disease that limits activities, recent dyspnea on mild exertion, such as walking from chair to television, or a recent FEV1 from 51% to 65%. Severe disease included patients with any of the following: marked pulmonary insufficiency, dyspnea at rest despite treatment, recent supplemental oxygen requirement, recent carbon dioxide retention, as evidenced by arterial carbon dioxide value of greater than 50 torr, recent hypoxemia as evidenced by an oxygen pressure less than 50 torr, or a recent FEV1 of less than 50%.

^§Obesity was defined as body mass index greater than 38 kg/m² or a report of morbid obesity in the medical record.