We are trying conducting a lifestyle intervention in which we are
trying to determine whether the intervention group are
exercising more than the control group after 6 months of
the intervention. We have calculated the difference in the proportion
doing exercise more than 3 times a week between baseline and 6
months in the control group and in the intervention group.
Can anyone help me with determining the CI on the difference in the
difference in proportions?
many thanks
John
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