Table A1.

Demographic and Clinical Variables by Completion Status

Characteristic	Dropped Out (n = 52)		Completed (n = 146)		P
	No.	%	No.	%
Age, years
Median	55		55
Range	19 to 83		20 to 84
≥ 50	32	62	87	60
Months since diagnosis
Median	34.8		39.7
Range	8.8 to 228.0		7.3 to 423.2
≥ 36	26	50	80	55
BMI, kg/m2
Median	28.5		27.1
Range	17.7 to 38.9		17.3 to 49.4
< 25 (underweight to normal)	14	27	50	34
25 to 30 (overweight)	19	37	48	33
≥ 30 (obese)	19	37	48	33
Strata
WBI, WFU	4	8	16	11
WBI, CCOP	20	38	40	27
PBI, WFU	14	27	46	32
PBI, CCOP	14	27	44	30
ECOG performance status
0	22	42	72	49
1	25	48	69	47
2	5	10	5	3
Sex
Female	33	63	73	50
Male	19	37	73	50
Race
Hispanic	0	0	1	1
Asian	1	2	0	0
Black	5	10	11	8
White	46	88	90	91
Marital status*
Single	9	18	13	9
Married or married-like	34	67	105	72
Separated, divorced, or widowed	8	16	28	19
Education*					.006
≤ High school	24	48	38	26
Vocational or some college	19	38	60	41
≥ College graduate	7	14	47	32
Income, US$*					.019
< 20,000	23	51	42	34
20,000 to 50,000	17	38	41	34
≥ 50,000	5	11	39	32
Work outside home*	14	27	45	31
Diagnosis
Primary brain tumor	31	60	99	68
Brain metastasis	15	29	38	26
PCI	6	12	9	6
Primary tumor type	n = 31		n = 99
Glioblastoma multiforme	4	13	19	19
Anaplastic astrocytoma	3	10	11	11
Anaplastic oligodendroglioma	6	19	10	10
Anaplastic oligoastrocytoma	1	3	2	2
Anaplastic ependymoma	2	6	2	2
Anaplastic mixed glioma	0	0	1	1
Low-grade astrocytoma	1	3	5	5
Low-grade oligodendroglioma	0	0	13	13
Low-grade oligoastrocytoma	0	0	1	1
Meningioma	7	23	15	15
Pilocycstic astrocytoma	2	6	4	4
Other	5	16	16	16
Metastasis site	n = 21		n = 47
Lung	11	52	29	62
Breast	8	38	8	17
Other or unknown	2	10	10	21
Brain volume, cm3*
Median	1,086		1,144
Range	865 to 1,382		901 to 1,624
≥ 1,200	8	16	44	31
CSF volume, cm3*
Median	213		206
Range	122 to 315		101 to 376
≥ 200	27	53	75	53
Brain or intracranial volume, %*					.012 (continuous); .035 (dichotomous)
Median	83.4		84.5
Range	78.1 to 89.5		74.8 to 92.0
Lesion or resection volume, cm3*
0	7	14	16	11
< 15	36	71	87	61
≥ 15	8	16	40	28
Hippocampus involvement*	10	19	13	9	.048
Location*
Frontal	16	36	46	35
Parietal	4	9	24	18
Occipital	5	11	6	5
Temporal	6	13	27	21
Basal ganglia	4	9	11	8
Cerebellum	7	16	10	8
Brainstem or spinal cord	3	7	6	5

Abbreviations: BMI, body mass index; CCOP, community clinical oncology program; ECOG, Eastern Cooperative Oncology Group; PBI, partial-brain irradiation; PCI, prophylactic cranial irradiation; WBI, whole-brain irradiation; WFU, Wake Forest University.

^*Some missing data.