Previously diagnosed diabetes: patients with a prior history of diabetes.
Newly diagnosed diabetes: patients newly diagnosed with an oral glucose tolerance test (OGTT). Fasting glucose and glucose 2 hours after a standard 75-g OGTT were measured. Diabetes was defined with the WHO-1999 diagnostic criteria (WHO, 1999b).
| Data from cohort-studies were age-standardised by RIVM according to the standard European population (Doll & Cook, 1967; Waterhouse et al., 1976). Therefore it is possible to compare countries.
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