In Rotterdam, Netherlands, 4802 people completed a baseline questionnaire in 1990 which included information about diet, exercise, and weight. None of the individuals had a known diagnosis of diabetes at the time of the questionnaire. From 1990-1996, 164 subjects were diagnosed with diabetes. The researchers investigated the association of exercise and risk of diabetes in this study. a.What type of study design is this?

This kind of study is an observational study to correlate an specific disease, like diabetes in this case, with a variable like in this case will be the exercise.

So if researches want to know the effect of the exercise in the risk of having diabetes, this study will be useful.

It will be describe the characteristics of a population over the risk of having diabetes.

Descriptive epidemiology is an example of how the disease frequency is present by the influence of the variable (exercise).

Hope this info is useful.