Radiation therapy at the end of life: a population-based study examining palliative treatment intensity

Radiation Oncology

Table 3 Multivariate model ¹ : radiation in last six months of life ²

	OR	95% CI		P value
Race/ethnicity
Non-Hispanic White
All Others	1.18	1.12	1.25	<.0001
Age at diagnosis
Age 65 - 69
Age 70 - 74	0.86	0.79	0.93	0.0002
Age 75 - 79	0.74	0.68	0.80	<.0001
Age 80 - 84	0.61	0.57	0.66	<.0001
85+	0.41	0.38	0.44	<.0001
Charlson index
0
1	1.01	0.96	1.07	0.6427
2 or more	1.07	1.01	1.13	0.0144
Marital status
Unmarried
Married	1.15	1.10	1.20	<.0001
Cancer type
Breast
Colorectal	0.65	0.62	0.69	<.0001
Prostate	0.82	0.76	0.88	<.0001
Prior radiation
No
Yes	1.45	1.37	1.53	<.0001
Surgery (last 6 months of life)
No
Yes	1.17	1.11	1.23	<.0001
Chemotherapy (last 6 months of life)
No
Yes	2.78	2.63	2.93	<.0001
Stage at diagnosis
0-3
4	0.70	0.66	0.73	<.0001

¹Referent group is the first line in each category, unless otherwise indicated.
²Additional factors for which we controlled in the multivariate model included census region, urban/rural designation, education, and time alive from diagnosis until death.

ISSN: 1748-717X