Table 2.

Multivariable Logistic Regression Results of Patient and Treatment Factors Associated With Odds of Longer-Term Survival (>3 years) After Diagnosis With Glioblastoma, NCDB 2005–2015

	Univariable OR (95% CI)	P	Multivariable OR (95% CI)	P
Age (years)
70	Reference		Reference
<60	5.58 (5.17–6.02)	<.0001	4.46 (4.11–4.84)	<.0001
60–70	2.60 (2.39–2.82)	<.0001	2.22 (2.04–2.43)	<.0001
Sex
Male	Reference		Reference
Female	1.15 (1.10–1.2)	<.0001	1.19 (1.19–1.31)	<.0001
Race
White	Reference		Reference
Black	1.26 (1.15–1.38)	<.0001	1.19 (1.08–1.32)	.0008
Others	1.69 (1.53–1.87)	<.0001	1.58 (1.40–1.79)	<.0001
Ethnicity
Non-Hispanic	Reference		Reference
Hispanic	1.56 (1.43–1.72)	<.0001	1.45 (1.31–1.60)	<.0001
Charlson/Deyo score
≥3	Reference		Reference
0	2.49 (2.11–2.93)	<.0001	1.92 (1.61–2.28)	<.0001
1	1.53 (1.29–1.82)	<.0001	1.42 (1.18–1.71)	.0001
2	1.28 (1.06–1.55)	.009	1.17 (0.96–1.44)	.1162
Tumor location
Infratentorial	Reference		Reference
Supratentorial	1.28 (1.01–1.62)	.0438	1.58 (1.21–2.06)	.0007
Others	0.92 (0.72–1.17)	.5142	1.22 (0.93–1.59)	.1513
Treatment type
Radiation only	Reference		Reference
Chemotherapy only	1.89 (1.09–3.29)	.024	1.40 (0.79–2.47)	.2506
Radiation + chemotherapy	2.59 (1.88–3.58)	<.0001	1.88 (1.36–2.61)	.0001
Surgery only	2.75 (2.00–3.78)	<.0001	2.30 (1.66–3.17)	<.0001
Surgery + radiation	3.27 (2.35–4.54)	<.0001	2.57 (1.84–3.58)	<.0001
Surgery + chemotherapy	5.00 (3.56–7.01)	<.0001	3.73 (2.65–5.25)	<.0001
All modalities	7.65 (5.61–10.43)	<.0001	4.89 (3.58 - 6.68)	<.0001

OR, odds ratio; 95% CI, 95% confidence interval.

All modalities: surgery + radiotherapy + chemotherapy.