Table 3.

—Adjusted Association Between the Number of Positive LNs and Survival

Variable	Lung Cancer-Specific Survival Hazard Ratio (95% CI)	Overall Survival Hazard Ratio (95% CI)
No. of positive LNs
1	Reference	Reference
2-3	1.16 (1.03-1.30)	1.13 (1.03-1.26)
4-8	1.53 (1.34-1.75)	1.46 (1.30-1.64)
> 8	2.25 (1.80-2.81)	2.17 (1.78-2.65)
Age, y	1.03 (1.02-1.04)	1.03 (1.03-1.04)
Female gender	0.79 (0.71-0.88)	0.78 (0.71-0.85)
Race/ethnicity
White	Reference	Reference
Black	0.91 (0.74-1.12)	0.96 (0.81-1.15)
Hispanic	1.00 (0.77-1.30)	1.08 (0.86-1.35)
Other	0.95 (0.77-1.17)	0.98 (0.82-1.17)
Married	0.90 (0.81-1.00)	0.87 (0.79-0.95)
Histology
Adenocarcinoma	Reference	Reference
Squamous cell carcinoma	0.66 (0.59-0.75)	0.76 (0.69-0.84)
Large cell carcinoma	1.01 (0.83-1.24)	1.12 (0.94-1.33)
Bronchioalveolar carcinoma	0.91 (0.73-1.13)	0.97 (0.80-1.18)
Other	0.75 (0.59-0.96)	0.82 (0.67-1.01)
Tumor status
T1A	Reference	Reference
T1B	1.42 (1.12-1.80)	1.43 (1.17-1.75)
T2	1.29 (1.00-1.65)	1.30 (1.05-1.61)
T2A	1.48 (1.20-1.83)	1.46 (1.22-1.75)
T2B	1.94 (1.54-2.45)	1.79 (1.47-2.19)
T3	2.21 (1.76-2.77)	1.97 (1.62-2.40)
Tumor location
Upper lobe	Reference	Reference
Middle lobe	1.24 (0.94-1.64)	1.21 (0.96-1.54)
Lower lobe	1.17 (1.05-1.30)	1.12 (1.02-1.23)
Other location	1.20 (1.01-1.43)	1.22 (1.05-1.42)
Type of surgery
Lobectomy	Reference	Reference
Pneumonectomy	1.12 (1.00-1.26)	1.11 (1.01-1.23)
Postoperative radiation therapy	1.11 (0.99-1.23)	1.11 (1.01-1.22)

See Table 1 legend for expansion of abbreviation.