Clinical and laboratory characteristics according to retinopathy status.

<p>Values represent mean (SE)</p><p>^a For p value comparison according to retinopathy status (four groups, non-parametric test, Wilcoxon's test, adjusted for multiple comparisons according to Holm)</p><p>^b Alone or in combination</p><p>Clinical and laboratory characteristics according to retinopathy status.</p

Multiple logistic regression analysis, any retinopathy.

<p>Multiple logistic regression analysis, any retinopathy.</p

Multiple regression analysis, macula edema.

<p>Multiple regression analysis, macula edema.</p

Multiple regression analysis, severe retinopathy.

<p>Multiple regression analysis, severe retinopathy.</p

Kaplan-Meier analysis relating time to retinopathy (any versus severe versus DME) to duration of diabetes (individual survival curves are labeled).

<p>Kaplan-Meier analysis relating time to retinopathy (any versus severe versus DME) to duration of diabetes (individual survival curves are labeled).</p