Table 1.
Descriptive statistics ≥ 65-years-old individuals without dementia at study entry in IPCI
| 65–70 | 70–75 | 75–80 | 80–85 | 85–90 | ≥ 90 | |
|---|---|---|---|---|---|---|
| Sample size, N | 216828 | 167493 | 125971 | 89172 | 52739 | 23529 |
| Follow-up time, median years (IQR) | 1.92 (1.00–3.33) | 1.84 (0.84–3.17) | 1.86 (0.92–3.17) | 1.83 (0.91–3.09) | 1.67 (0.75–2.84) | 1.50 (0.70–2.67) |
| Age at study entry or age at group entry, mean years (SD) | 66.23 (1.58) | 71.18 (1.56) | 76.18 (1.55) | 81.15 (1.54) | 86.00 (1.44) | 91.33 (2.24) |
| Male | 49.16 | 47.89 | 45.28 | 41.23 | 35.74 | 28.59 |
| Incident dementia (per 1000 PY) | 1.52 | 4.10 | 9.88 | 20.09 | 30.76 | 40.00 |
| Mortality rate per 1000 PYa | 10.97 | 17.35 | 28.19 | 48.94 | 84.87 | 182.61 |
| Hypertension prevalence | 55.35 | 64.19 | 71.88 | 78.95 | 83.33 | 84.40 |
| Diabetes mellitus prevalence | 14.78 | 18.18 | 20.82 | 22.17 | 21.90 | 19.27 |
| Dyslipidemia prevalence | 37.99 | 44.29 | 47.35 | 47.09 | 41.55 | 29.84 |
| Stroke prevalence | 2.80 | 3.95 | 5.41 | 7.19 | 9.12 | 10.83 |
| Myocardial infarction prevalence | 4.07 | 5.25 | 6.30 | 7.41 | 7.70 | 7.76 |
| Heart failure prevalence | 1.64 | 2.77 | 5.02 | 8.70 | 14.05 | 21.14 |
| Atrial fibrillation prevalence | 3.57 | 5.63 | 8.03 | 11.22 | 14.73 | 17.14 |
Values are percentages unless stated otherwise; prevalence—the disease is present at the start of that age group or at database entry; individuals that contribute follow-up time to multiple age groups are included in all age groups they contribute to; acalculated by dividing the total number of deceased individuals by the total number of person-years (PY) follow-up per 1000 in that specific age group. IPCI Interdisciplinary Processing of Clinical Information database, IQR interquartile range, N number, SD standard deviation