Category | Mean difference (mmHg) | SD | Intracluster correlation coefficient | Design effect | Clusters per arm | Individuals per arm | Total sample size |
---|---|---|---|---|---|---|---|
Normotensive | 5 | 18.8 | 0.01 | 1.57 | 7 | 406 | 812 |
Prehypertensive | 5 | 13.6 | 0.01 | 1.23 | 7 | 168 | 336 |
Hypertensive | 5 | 15.7 | 0.01 | 1.34 | 7 | 245 | 490 |