The association between PAD and the number of CVD risk factors. A, The frequency of CVD risk factors (1-5 risk factors) is shown for patients with no PAD (open bars) and patients with PAD (filled bars). Inset, % patients (presence or absence of PAD) with ≤2 or > 2 risk factors. B, Association between risk of PAD and the number of CVD risk factors in addition to age. Data expressed as Odds ratio (± 95% CI). Comparisons were made between estimates of frequency distribution of the number of risk factors (i.e. ≥2 risk factors vs 1 risk factor) by Cochran-Mantel-Haenszel test.