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Epidemiology for Health and Medical Sciences - Question 1

1. Relationship between treatment and improvement after 8 weeks

Stata Code: tab treatment improve_8wk, chi2

The primary outcome variable improve_8wk is a ordinal variable (0 = No and 1 = Yes) represents whether patient experienced an improvement in PSD at 8 weeks. On the other hand, the treatment variable is also a qualitative variable that represents the treatment undertaken by the patient (0 = Sham and 1 = tacs). Thus, the most appropriate test to test the association between treatment and primary outcome is chi square test for independence

c. Null Hypothesis: H₀:

That is, there is no association between treatment and patient experienced an improvement in PSD at 8 weeks

Alternative Hypothesis: H_a:

That is, there is an association between treatment and patient experienced an improvement in PSD at 8 weeks

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