TABLE 1.
2-year transition probabilities from five state model for cognitive status
| Transition | Intensive | Standard | Hazard Ratio | ||
|---|---|---|---|---|---|
| From | To | Overall | Treatment | Treatment | (95% CI) |
| Normal Cognition | MCI | 4.3% (3.9%, 4.9%) | 4.1% (3.6%, 4.6%) | 4.6% (4.1%, 5.2%) | 0.87 (0.79, 0.96) |
| Normal Cognition | Probable Dementia | 0.6% (0.5%, 0.9%) | 0.6% (0.3%, 0.9%) | 0.6% (0.5%, 0.9%) | 1.26 (0.76, 2.09) |
| Normal Cognition | Death | 2.3% (2.0%, 2.7%) | 2.2% (1.9%, 2.7%) | 2.4% (2.0%, 2.9%) | 0.96 (0.73, 1.25) |
| MCI | Intermittent MCI | 31.6% (28.9%, 34.5%) | 32.8% (29.1%, 36.4%) | 30.5% (27.2%, 34.0%) | 1.04 (0.87, 1.25) |
| MCI | Probable Dementia | 5.9% (4.5%, 7.7%) | 4.9% (3.4%, 7.0%) | 6.9% (5.0%, 9.5%) | 0.70 (0.46, 1.07) |
| MCI | Death | 10.0% (8.3%, 11.9%) | 9.3% (7.1%, 12.1%) | 10.5% (8.3%, 13.3%) | 0.88 (0.62, 1.24) |
| Intermittent MCI | MCI | 25.1% (20.7%, 30.2%) | 24.4% (18.4%, 31.5%) | 25.6% (20.0%, 32.2%) | 0.92 (0.59, 1.45) |
CI denotes confidence interval and MCI Mild Cognitive Impairment. Estimates are from multistate survival model as shown in FIGURE 1. In SPRINT, 63% of follow-up was during the active intervention phase, the rest consisting of observational follow-up. Above estimates similarly assume 63% of 2-year interval consists of active intervention.