Skip to main content

Table 4 Sample size estimates to detect various differences in mean changes of systolic BP between African Americans and Whites using a one-sided t-tests with alpha = 0.05 and standard deviation of change =16 mmHg

From: The heart healthy lenoir project-an intervention to reduce disparities in hypertension control: study protocol

Power (1-Beta) Sample size - African Americans Sample size - Whites Difference in mean changes of SBP between two races
0.80027 792 792 2.0
0.80033 507 507 2.5
0.80023 352 352 3.0
0.80125 260 260 3.5
0.80086 199 199 4.0
0.80002 157 157 4.5
0.80193 128 128 5.0