1. Atotal of 300 participants are selected for a study of risk factors for cardiovascular disease. At baseline (study start), 48 are classified as hypertensive. At one year, an additional 24 have developed hypertension and at 2 years another 16 have developed hypertension. What is the prevalence of hypertension at 2 years in the study?
1) Prevalence 2 years=
2) What is the 2 year cumulative incidence of hypertension?
Cumulative incidence 2 years =
2. The following data were collected in a study relating hypertensive status measured at the baseline to incident stroke over 5 years.
1) Compute the Cumulative incidence of stroke in the study. Cumulative Incidence =
2) Compute the Cumulative incidence of stroke in patients classified as hypertensive at baseline
Cumulative Incidence Hypertension =
3. Compute the cumulative incidence of stroke in patients free of Hypertension at baseline.
Cumulative Incidence not Hypertensive =
1) Compute the risk difference of stroke in patients with Hypertensive as compared to patients free of hypertension. Risk Difference =
2) Compute the relative risk of stroke in patients with hypertension as compared to patients free of hypertension. Relative Risk =
3) Compute the population attributable risk of stroke due to hypertension. PAR =
Free of stroke at 5 years Stroke
Baseline: Not Hypertensive 1,904 92
Baseline: Hypertensive 468 36