Table 2.

SpaceOAR vs. no SpaceOAR, categorical variables

Categorical variable		No SpaceOAR		SpaceOAR		Total		p-value*
		n	%	n	%	n	%
Clinical stage	T1c	134	77.0	123	70.7	257	73.8	0.349
	T2a	26	14.9	34	19.5	60	17.2
	T2b	9	5.2	8	4.6	17	4.9
	T2c	5	2.9	4	2.3	9	2.6
	T3a,b,c	0	0.0	5	2.9	5	1.4
103Pd implant Rx dose (Gy)	80	90	51.7	106	60.9	196	56.3	0.005
	90	22	12.6	34	19.5	56	16.1
	115	29	16.7	22	12.6	51	14.7
	125	33	19.0	12	16.9	45	12.9
NCCN Risk Group	Low	3	1.7	0	0.0	3	0.9	0.061
	Intermediate	119	68.4	113	64.9	232	66.7
	High	52	29.9	57	32.8	109	31.3
	Very high	0	0.0	4	2.3	4	1.2
Diabetes	No	173	99.4	174	100.0	347	99.7	0.317
	Yes	1	0.6	0	0.0	1	0.3
Hypercholesterolemia	No	172	98.8	174	100.0	346	99.4	0.156
	Yes	2	1.2	0	0.0	2	0.6
Hypertension	No	171	98.3	174	100.0	345	99.1	0.082
	Yes	3	1.7	0	0.0	3	0.9

Chi-squared test, p-values ≤ 0.5 in bold