Between town and within town components of variance for the individual risk variables
| Risk variable | Between town variance | Within town variance | Intra-town correlation |
| Continuous variables | |||
| Systolic blood pressure | 17.7 | 403.4 | 0.042 |
| Serum total cholesterol | 0.0203 | 1.07 | 0.019 |
| Body mass index | 0.0473 | 10.32 | 0.005 |
| Height | 1.06 | 42.1 | 0.025 |
| Categorical variables | |||
| Current smoking4-150 | 0.109 | 1.0 | |
| Heavy drinking | 0.204 | 1.0 | |
| Physical inactivity | 0.108 | 1.0 | |
| Manual social class | 0.412 | 1.0 | |
↵4-150 Within town variance is set at 1 for categorical binary variables.