4 Recommendations for research

4 Recommendations for research

The Public Health Interventions Advisory Committee (PHIAC) recommends that the following research questions should be addressed.

4.1 What are the cut-off points for body mass index (BMI) among adults from black, Asian and other minority ethnic groups living in the UK that can be used to classify overweight and obesity or are 'risk equivalent' to the current thresholds in relation to mortality, cancer, type 2 diabetes, stroke and myocardial infarction set for white European populations? Ideally, prospective cohort studies should be used. Studies should use objectively measured height and weight and consider incidence as well as prevalence. Estimates should be adjusted for potential confounders.

4.2 What are the cut-off points for waist circumference among adults from black, Asian and other minority ethnic groups living in the UK that are 'risk equivalent' to the current thresholds in relation to mortality, cancer, type 2 diabetes, stroke and myocardial infarction set for white European populations? Ideally, prospective cohort studies should be used. Studies should use objectively measured waist circumference and consider incidence as well as prevalence. Estimates should be adjusted for potential confounders.

4.3 What are the corresponding cut-off points for waist circumference among adult males and females from black, Asian and other minority ethnic groups living in the UK, based on overweight and obesity BMI classifications?

4.4 Is the risk of ill health the same for first, second and third generation immigrants from black, Asian and other minority ethnic groups at the same BMI and waist circumference thresholds?

4.5 What are the risks and benefits of developing single-figure cut-off points on BMI and waist circumference for black, Asian and other minority ethnic groups to help prevent diabetes and other conditions?

4.6 Are black, Asian and other minority ethnic groups aware that they are at the same risk of type 2 diabetes and mortality at a lower BMI, compared to the white population?

4.7 Are clinicians, practitioners and weight management service providers aware that black, Asian and other minority ethnic groups are at the same risk of type 2 diabetes and mortality at a lower BMI compared to the white population. If so do they intervene at lower BMI and waist circumference thresholds?

4.8 How effective and cost effective are lifestyle interventions for people from black, Asian and other minority ethnic groups at different BMI and waist circumference thresholds, compared to the general population? Ideally this evidence should come from randomised controlled trials.

More detail identified during development of this guidance is provided in Gaps in the evidence.

  • National Institute for Health and Care Excellence (NICE)