Question 1: What is the spatial distribution of obesity and overweight in Bangladesh? Who are the most affected groups?
The underlying objective behind this question is to be able to improve targeting of the intervention.
|WHAT are the characteristics of a well-formulated policy question?||Comments for Question 1|
|1. The question must respond to a relevant policy need||The policy relevance is ensured by going through steps 1 and 2 of the question formulation process.|
|2. The question must be answerable with existing quantitative data||Data experts need to identify the main datasets available that measure this indicator.|
Population-based surveys seem to be a good source of data for this question.
Modelled data also exists on BMI (www.ncdrisc.org) that can help answer the question.
This has pros and cons that need to be carefully balanced when developing the data analysis plan.
|3. The question must provide a timely answer for policy use||The timeliness of the answer is discussed during steps 1 and 2 of the question formulation process. Note that only the data analysis plan will be able to define precisely the time needed for the analysis.|
|4. The analysis of the question must lead to actionable recommendations and decisions||This is ensured by going through steps 1 and 2 of the question formulation process.|
|5. The question must specify:
a) the population groups
b) the type of intervention
c) the objective
d) the time frame
e) the expected outcomes
|a) The age groups need to be specified: Adults? Children? Adolescents? All? |
The data analysis plan will specify what is meant by “most affected groups”.
Should the analysis look at overweight and obesity by:
Region? (need for representative data at sub-national level). Use the data where it is actionable. If decisions are taken at regional level, it makes sense to use regional subgroups.
Rural vs urban?
Incomes quintiles AND region?
A brief literature review can help to define those groups in the context of Bangladesh. The data available can also limit the choice of the groups.
b) This question is about a nutrition target, not a specific intervention.
c) The underlying “policy objective” could be made more specific as this would guide the development of the data analysis plan.
d) The question seems to suggest looking at the most recent data. If data is only available for 2005, is the analysis still relevant? The time frame can also be chosen based on official targets, or a strategic year for the launch of a new plan.
e) BMI is usually used as the outcome indicator of overweight and obesity. The data analysis plan will detail whether the analysis will use categories of BMI or the mean BMI as the outcome indicator.
|6. The question must imply data analysis methods which are suitable for use with the NIPN approach||The question implies the use of a descriptive data analysis method.|
The data analysis plan should detail the methods to be used, e.g. t-test to compare mean BMI among the different groups, or a graphic display of the mean BMI with confidence intervals.