Publication, Part of National Diabetes Audit: Non-Diabetic Hyperglycaemia, Diabetes Prevention Programme
Non-Diabetic Hyperglycaemia, 2020-21, Diabetes Prevention Programme
Progression to type 2 diabetes
Figure 6: Follow up1 of NDH / diabetes status over previous audit periods, GP-recorded non-diabetic hyperglycaemia (NDH ), 2017-18 - 2020-21, England.
1. Includes all people diagnosed with NDH as recorded in the data taken for the 2017-18 DPP report.
2. Almost all subsequent diagnoses were of type 2 diabetes (2018-19: 99.6%, 2019-20:99.3%, 2020-21: 99.5%)
3. It is not known why people no longer have an NDH diagnosis recorded.
4. People who did not appear in the NDH or NDA collection for this audit period, and who are known to have died by the end of the same audit period.
5. People whose latest glycaemic test (HbA1c or fasting plasma glucose), was recorded in the audit period, and was in the non-diabetic hyperglycaemic range.
- People may still be recorded with an NDH diagnosis, although their glycaemia may have moved outside of the NDH glycaemic range (HbA1c 42-47 mmol/mol or FPG 5.5-6.9 mmol/l).
- 70 per cent of the 2017-18 cohort that were still diagnosed with NDH in 2018-19 had a glycaemic test result in the NDH glycaemic range, confirming they still had NDH in that year.
Figure 7: GP-recorded type 2 diabetes (T2DM), by NDH / diabetes1 status in the last audit period, 2019-20 / 2020-21, England.
1. Includes people with diabetes, as recorded in the data taken for the 2020-21 NDA report, from GP practices in England, excluding those diagnosed with type 1 diabetes.
2. NDA 2019-20 and NDA 2020-21 are 15 month audit periods. A person diagnosed with diabetes in Jan-Mar 2020 would be newly diagnosed in both the 2020-21 and 2019-20 collections.
1. Includes all people diagnosed with NDH as recorded in the data taken for the 2017-18 DPP report.
2. Breakdowns are univariate and do not consider any potential interactions between characteristics.
- 8.1 per cent of people in the 2017-18 audit are known to have died by the time of the 2020-21 NDH audit collection.
- This could affect the progression-to-diabetes rate if people who otherwise might have developed diabetes have died.
- People can be removed from the analysis at the time of their death, to find the diabetes progression rate over time amongst the living cohort.
1. Includes all people diagnosed with NDH as recorded in the data taken for the 2017-18 DPP report.
2. Breakdowns are univariate and do not consider any potential interactions between characteristics.
3. Index of Multiple Deprivation (IMD) used to assign levels of deprivation by person’s home address where IMD 1 is for the most deprived and IMD 5 is for the least deprived areas.
- The risk of developing diabetes is highest in people aged 40 – 64 years, from most deprived areas, of Asian ethnicity and those with an obese BMI.
Last edited: 21 July 2023 1:06 pm