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Table 1 Descriptive statistics ≥ 65-years-old individuals without dementia at study entry in IPCI

From: The association of vascular disorders with incident dementia in different age groups

  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
  1. 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