Subgroup data Both sexes (95% CI) I2, p value Data points
Dementia types Dementia All 4.9 (3.0-6.9) 98.8, <0.001 9
Male 6.7 (3.6-9.9) 95.9, <0.001 8
Female 3.1 (1.2-5.0) 92.0, <0.001 8
Alzheimer’s disease 2.0 (1.0-2.9) 80.0, <0.001 5
Mixed dementias 0.8 (0.2-1.4) 56.1, 0.102 3
Vascular dementias 0.3 (0.1-0.5) 0.0, 0.969 3
Parkinson’s disease 0.1 (0.03-0.3) 34.3, 0.217 2
Geopolitical zone North-central 6.4 (3.5-9.3) - 1
North-west 5.4 (0.1-10.7) 89.6, <0.001 2
South-west 4.6 (2.3-6.9) 97.8, <0.001 6
Setting Rural 2.8 (1.5-4.1) - 1
Urban 4.9 (2.5-7.4) 79.4, <0.001 3
Peri-urban (mixed urban-rural) 5.3 (2.4-8.2) 98.2, <0.001 5
Age 60-69 3.9 (2.1-5.7) 93.1, <0.001 7
70-79 6.3 (4.1-8.5) 95.7, <0.001 14
80-89 10.1 (1.2-19.1) 97.2, <0.001 5
90+ 11.0 (6.7-15.3) 18.1, 0.299 5