borderline significanceP = 0.06
However, in the multivariate logistic regression analysis, only older age (OR 4.6, 95% CI 1.9–8.1, P = 0.001) and longer duration of diabetes (OR 2.9, 95% CI 1.2–6.9, P = 0.01) remained significant, whereas the effect of CKD was reduced to borderline significance (OR 2.4, 95% CI 0.96–5.7, P = 0.06) ( Table 3 ).