Table 5.

Summary ORs, with 95% confidence limits and P values, from proportional (cumulative) odds models for extent of collagen in medial smooth muscle layer (none, ≤25%, 25%–50%, 50%–75%, 75%–100%; among samples with ≥75% full cross-sections; n=426) by baseline attributes

Factora	OR	95% Wald Confidence Limits		P Value
		Lower	Upper
Age per decade	1.10	0.97	1.26	0.15
Female	0.51	0.34	0.76	<0.001
Black	0.86	0.59	1.24	0.41
Diabetes prevalence	0.87	0.60	1.26	0.45
Cardiovascular disease	1.05	0.73	1.51	0.81
Coronary artery disease	0.73	0.49	1.01	0.14
Cerebrovascular disease	0.85	0.51	1.42	0.54
Venous thromboembolic disease	0.49	0.23	1.02	0.06
Peripheral arterial disease	0.98	0.59	1.63	0.93
Body mass index, per kg/m2	1.00	0.98	1.02	0.88
Tobacco use	0.80	0.56	1.17	0.25
On dialysis at time of surgery	1.23	0.87	1.87	0.21
Forearm fistula	0.49	0.31	0.77	0.002

^aSee Table 1 footnotes for specific factor definitions.