1. Example: a total of 2000 subjects, divided into intervention group of 1000 people, the control group, 1000 people,
Hypertension prevalence rate of intervention group at baseline d 15% in the control group was 18%,
After a month after the intervention, intervention group hypertension prevalence rate was 8%, the control hypertension prevalence rate was 15%,
How to judge whether intervention is effective,
2. If the ending index for binary classification variables (whether they will suffer from high blood pressure), normal weight, overweight, obesity, and classification of three variables, what to do,
Thank you,