Table 2.

Multiple logistic regression analysis of possible outcome predictors for treatment effects at four time points after treatment in PRF + ozone group

Predictor	Post-treatment			3 mon			6 mon			1 yr
	OR	95% CI	P-value	OR	95% CI	P-value	OR	95% CI	P-value	OR	95% CI	P-value
Age	0.868	0.778–0.970	0.012*	1.010	0.937–1.088	0.803	1.016	0.914–1.129	0.766	0.902	0.773–1.054	0.195
Sex	2.830	0.410–10.570	0.376	1.127	0.323–3.930	0.852	1.474	0.128–8.109	0.655	3.128	0.295–33.170	0.344
Disease course	1.000	0.970–1.027	0.996	0.980	0.980–1.019	0.929	1.004	0.977–1.031	0.792	0.947	0.876–1.023	0.164
Diabetes	9.065	0.837–98.213	0.07	0.157	0.157–4.065	0.788	2.348	0.379–14.547	0.359	5.943	0.450–78.539	0.176
Hypertension	0.160	0.019–1.335	0.09	0.276	0.276–6.811	0.695	1.053	0.162–6.850	0.957	2.020	0.148–27.535	0.598
Treatment number	1.223	0.928–1.610	0.153	0.754	0.754–1.138	0.468	1.019	0.769–1.349	0.898	0.884	0.605–1.292	0.524

Notes: CI: confidence interval; OR: odds ratio.