TABLE I

Prevalence of retinopathy and nephropathy above and below optimal antimodal cut off points for two hour plasma glucose, fasting plasma glucose, and glycated haemoglobin concentrations and their corresponding sensitivities and specificities

Two hour plasma glucose (mmol/l)Fasting plasma glucose (mmol/l)haemoglobin ( % )
Condition<12.6>=12.6<9.3>=9.3<7.8>=7.8
Retinopathy*
No of subjects743210818135818135
Percentage with retinopathy0.513.31.216.31.315.6
Sensitivity (%)87.568.865.6
Specificity (%)80.287.787.6
Nephropathy(dagger)
No of subjects740211817134817134
Percentage with nephropathy1.66.21.87.51.87.5
Sensitivity (%)52.040.040.0
Specificity (%)78.686.686.6
  • *Values missing for seven subjects.

  • (dagger)Values missing for nine subjects.