Comparison of ADA 1997 and WHO 1985 criteria for diabetes in south Indians – the Chennai Urban Population Study

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Abstract
SUMMARY Aims  To compare the American Diabetes Association (ADA) fasting criteria and World Health Organization (WHO) 2‐h criteria for diabetes in an urban south Indian population.Methods  Subjects were drawn from the Chennai Urban Population Study. Of the 1001 subjects studied, 52 (5.2%) were diagnosed as having diabetes according to WHO 2‐h criteria and 32 (3.2%) according to the ADA fasting criteria.Results  Twenty‐five (48%) of the subjects diagnosed with diabetes by the WHO 2‐h criteria were not classified as having diabetes by the ADA fasting criteria. Similarly, of the 78 subjects (7.8%) classified as having impaired glucose tolerance (IGT), only eight (10.3%) had impaired fasting glucose (IFG) according to the ADA fasting criteria. The overall agreement between the WHO 2‐h criteria and ADA fasting criteria was poor (κ = 0.40).Conclusions  Use of the ADA fasting criteria results in a lower prevalence rates of diabetes in this lean urban south Indian population.