Characteristics of the study population at baseline, with or without serial magnetic resonance imaging
| Characteristic | With follow up | Without follow up |
|---|---|---|
| Values are age and sex adjusted means (SD) or percentages unless stated otherwise. | ||
| *p<0.05 (analysis of covariance). | ||
| ARWMC, age related white matter changes rating scale; MMSE, mini-mental state examination; na, not applicable. | ||
| Number of subjects | 38 | 230 |
| Age at baseline (years) | 65.9 (8.8) | 72.3 (9.7)* |
| Women | 47.4% | 60.9% |
| Mean duration of follow up (years; range) | 2.2 (1.0 to 5.1) | na |
| Mean ARWMC baseline (range) | 0.8 (0 to 8) | 1.8 (3.7) |
| Mean ARWMC follow up | 1.5 (0 to 17) | na |
| Hypertension | 78.4% | 57.2% |
| Systolic blood pressure (mm Hg) | 149.5 (25.8) | 150.5 (21.9) |
| Diastolic blood pressure (mm Hg) | 85.3 (12.3) | 86.0 (10.5) |
| Diabetes | 0 | 9.4% |
| Smoking (ever) | 32.1% | 37.8% |
| MMSE | 21.4 (4.6) | 19.7 (5.3) |