Table 4B. Subset analysis of the effect of aspirin use in patients with GS 9–10 histologies .

Variable	5-y OS%	HR	95% CI	P value
Age per year	N/A	1.162	1.102–1.327	0.027
Gleason score per unit	N/A	0	0.00–0.00	0.996
T-stage per unit	N/A	1.43	0.857–2.386	0.171
% cores positive	N/A	11.16	0.105–1184.064	0.311
Pelvic irradiation
Yes vs. no	70% vs. 100%	0	0.00–0.00	0.996
Hormone deprivation
≥24 mo vs. <24 mo	92% vs. 54%	0.133	0.016–1.112	0.063
N-stage
N0 vs. N1	75% vs. 67%	1.782	0.199–15.991	0.606
Aspirin
Yes vs. no	88% vs. 37%	0.165	0.032–0.853	0.0315

Multivariate analysis of variables with P ≤ 0.1