A public health researcher is interested in whether the rates of obesity decline

Question

A public health researcher is interested in whether the rates of obesity declined in rural areas in response to a federal policy change in health insurance. She looks at health data collected before and after the policy change comparing rural and urban areas in Arizona. What type of guasi-experimental design was conducted? auasissentimental desian wes condu strd fter the policy chango O a) Nonequivalent control group O b) Interrupted time-series O c) Nonequivalent control group interrupted time-series ndenenden

Explanation / Answer

The answer is b) Interrupted time series design as in this type of a design the same group is measured continuously and at a particular point after the intervention to check the differences.

the other options are incorrect as:

a) nonequivalent control group design has two non-randomizable groups with both post and pretest. This includes already divided groups.

c) Isn't a quasi-experimental design

d) in such an experiment multiple groups are present and a single participant is a part of only one condition.  

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