Table 2.

Adjusted characteristics for stage IIIB/IV NSCLC patients associated with receipt of any chemotherapy

Patient Characteristics N=3,612	Effects of patient characteristics on receipt of any first-line chemotherapy within 120 days of diagnosis adjusted for all variables noted below
	Odds Ratio	95% CI	P
Age at diagnosis, Years
< 55	Ref
55 – 64	0.70	0.582 to 0.845	0.0002
65 – 69	0.56	0.463 to 0.687	< .0001
70 – 74	0.34	0.283 to 0.419	< .0001
75 – 79	0.27	0.216 to 0.326	< .0001
80 +	0.10	0.080 to 0.126	< .0001
Gender
Female	Ref
Male	1.09	0.978 to 1.201	0.1218
Race Ethnicity
White	Ref
Hispanic	1.09	0.875 to 1.361	0.4382
Black	0.90	0.739 to 1.104	0.3202
Asian/Pacific Islander	1.06	0.872 to 1.28	0.5706
Other race	1.07	0.729 to 1.573	0.7280
% College Educated (Census Tract Quintile)
1 (lowest)	Ref
2	1.13	0.963 to 1.336	0.1319
3	1.09	0.931 to 1.287	0.2749
4	1.38	1.169 to 1.621	0.0001
5 (highest)	1.48	1.255 to 1.754	< .0001
Modified Charlson Comorbidity Score
0	Ref
1	0.99	0.870 to 1.129	0.8901
2	0.99	0.820 to 1.187	0.8877
3+	0.61	0.531 to 0.704	< .0001
AJCC Stage at Diagnosis
III	Ref
IV	0.69	0.617 to 0.780	< .0001
Tumor Grade
Well-moderately differentiated	Ref
Poorly differentiated/undifferentiated	0.94	0.792 to 1.125	0.5199
Unknown	1.05	0.895 to 1.231	0.5505
Year of Diagnosis
2000	Ref
2001	0.98	0.789 to 1.203	0.8108
2002	1.01	0.816 to 1.242	0.9523
2003	1.30	1.054 to 1.604	0.0142
2004	1.37	1.109 to 1.685	0.0034
2005	1.55	1.253 to 1.905	< .0001
2006	1.58	1.281 to 1.958	< .0001
2007	1.62	1.311 to 2.009	< .0001
HMO
A	Ref
B	0.54	0.457 to 0.642	< .0001
C	0.73	0.584 to 0.903	0.0040
D	0.89	0.739 to 1.061	0.1874

^**Interaction between Health Plan and age not significant at 0.1564

^**Interaction between Year of Diagnosis and age not significant at 0.7730