: Consider the following research title: “Seasonal distribution of endemic typhus in the Southern United States, 1922-1925” 1st statement: This study can suggest possible etiologic hypotheses. 2nd statement: A trend across time can be observed using this study. Both statements are true 1st statement is true, while the 2nd statement is false 1st statement is false, while the 2nd statement is true Both statements are false
Arrange the following in order of increasing strength of epidemiologic evidence. 1. Longitudinal ecologic study II. Cross-sectional ecologic study III. Prevalence study IV. Prospective cohort O II, I, III, IV O Some of these are equal in strength. O I, II, III, IV O III, II, I, IV
Consider the following research title: “Seasonal distribution of endemic typhus in the Southern United States, 1922-1925” 1st statement: This study can suggest possible etiologic hypotheses. 2nd statement: A trend across time can be observed using this study, Both statements are true 1st statement is true, while the 2nd statement is false 1st statement is false, while the 2nd statement is true Both statements are false
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