1) a) Explain the study of hypothesis?

 b) Specify the outcome variables and also state how they were measured?

 c) Explain the study factors (exposures) and how were they measured?

2) a) Specify the participation rate within this study? Explain some of its implications.

 b) Explain the response rates within this study? Also state their implications

3) Explain if the information biases have affected results in any way? Why or why not? Also explain the authors discussions over this possibility adequately?