Table 1—

Cases and person-years by duration of diabetes for retinopathy and nephropathy

Duration (years)Nephropathy
Retinopathy
YouthYounger adultsOlder adultsYouthYounger adultsOlder adults
<5
 Cases5231301318
 Person-years3752,7121,9964062,8371,998
5–10
 Cases4293436860
 Person-years2872,2661,8043102,3581,709
10–15
 Cases107655912086
 Person-years1931,6181,2722131,4141,005
15–20
 Cases10866497344
 Person-years111837678131588444
20–25
 Cases6452054115
 Person-years4735324152217123
>25
 Cases12211593
 Person-years1615674177626
  • Data are n. Youth, onset age of diabetes <20 years; younger adults, onset age of diabetes 20–39 years; older adults, onset age of diabetes 40–59 years. Nephropathy is defined as protein-to-creatinine ratio in spot urine test ≥0.5 g/g. Duration is defined as time from diagnosis of diabetes. Retinopathy is defined as presence of at least one microaneurysm or hemorrhage or evidence of proliferative retinopathy or its treatment.