Data obtained by GP from the quality management and analysis system (QMAS), which generates quality pay, show CKD prevalence in England of around 2.2 per cent.
But experts say the true level of CKD in the UK is likely to be close to 5 per cent.
Obesity prevalence, reported as 7.1 per cent on QMAS, is also lower than expected. However, prevalence of 1.3 per cent reported for AF is close to predicted levels.
Data for these conditions was collected through the quality framework for the first time in 2006/7. All of the QMAS figures are measured against the entire population, rather than specific age groups.