Table 1.

Baseline Characteristics of Cohort and Use of Invasive Staging Techniques in Stage IIIA NSCLC N=7583

Age
67–69	1118 (15%)
70–74	2305 (30%)
75–79	2197 (29%)
80–84	1331 (18%)
85–94	632 (8%)
Sex
Male	4308 (57%)
Female	3275 (43%)
Race
White	6653 (88%)
Black	635 (8%)
Other	295 (4%)
Marital Status
Married	3972 (52%)
Unmarried	3349 (44%)
Unknown	262 (4%)
Income
1st quintile	1449 (19%)
2nd quintile	1451 (19%)
3rd quintile	1446 (19%)
4th quintile	1450 (19%)
5th quintile	1447 (19%)
Unknown	340 (4%)
Influenza Vaccination
Influenza Vaccination in last 18 months	4013 (53%)
No Influenza Vaccination	3570 (47%)
Treatment Group*
Best supportive care	1834 (24%)
Cancer specific therapy	2051 (27%)
Curative intent therapy	3698 (49%)
Invasive Staging
Any Invasive Staging Technique	1678 (22%)
No Invasive Staging	5905 (78%)

^*Patients classified as best supportive care did not receive any cancer specific therapy (chemotherapy, radiation, or surgery). Patients who received chemotherapy or radiation alone were classified as cancer specific therapy. Patients who received combination chemotherapy and radiation therapy or any therapy that involved surgical resection were classified as curative intent therapy.