Table 4:

Proportional hazards model for post-recurrence survival based on time since most recent previous surveillance.

	HR (95% CI)	p-value
Time since last surveillance (per month)	1.02 (0.99, 1.04)	0.432
≥ 14 months since last surveillance	1.01 (0.62, 1.65)
Recurrence: Distant	(reference)	0.020
Local	0.78 (0.64, 0.96)
Detection: Asymptomatic		< 0.001
Symptomatic	1.49 (1.20, 1.85)
Age (per decade)	1.17 (1.08, 1.27)	< 0.001
Sex: Male		0.001
Female	0.76 (0.64, 0.89)
Histology: Adenocarcinoma		0.023
Squamous	1.29 (1.05, 1.60)
Other histology	1.20 (0.96, 1.49)
Surgery: Lobectomy		0.837
Pneumonectomy	0.85 (0.58, 1.23)
Segmentectomy	1.01 (0.66, 1.55)
Wedge resection	1.04 (0.80, 1.35)
Chronic obstructive pulmonary disease	1.04 (0.85, 1.28)	0.684
Congestive heart failure	1.47 (1.13, 1.92)	0.004
Coronary artery disease	0.80 (0.64, 0.98)	0.034
Diabetes	1.17 (0.91, 1.51)	0.229
Peripheral vascular disease	1.49 (1.16, 1.91)	0.002
Psychiatric	0.99 (0.74, 1.33)	0.963
Substance abuse	1.36 (0.96, 1.94)	0.083