Table 2. PAF for dementia risk factors in India (n=2004).

	RR for dementia (95% CI)	Risk factor prevalence2,8,10	Communality	PAF	Weighted PAF*
Early life (<45 years)
Low education	1.6 (1.3–2.0)	92.2%	44%	35.6% (33.5–37.7)	13.6% (12.2–15.2)
Midlife (45–64 years)
Hearing loss	1.9 (1.4–2.7)	22.3%	37%	16.7% (15.2–18.4)	6.4% (5.4–7.6)
Hypertension	1.6 (1.2–2.2)	19.3%	60%	10.4% (9.1–11.8)	4.0% (3.2–4.9)
Obesity	1.6 (1.3–1.9)	13.7%	64%	7.6% (6.5–8.8)	2.9% (2.2–3.7)
Later life (≥65 years)
Smoking	1.6 (1.2–2.2)	39.9%	68%	19.3% (17.6–21.1)	6.4% (5.4–7.6)
Depression	1.9 (1.6–2.3)	5.2%	72%	4.5% (3.7–5.5)	1.7% (1.2–2.4)
Physical inactivity	1.4 (1.2–1.7)	15.3%	78%	8.4% (7.3–9.7)	2.2% (1.6–2.9)
Low social contact	1.6 (1.3–1.9)	10.4%	57%	4.0% (3.2–4.9)	2.3% (1.7–3.1)
Diabetes	1.5 (1.3–1.8)	9.3%	52%	4.4% (3.6–5.4)	1.7% (1.2–2.4)
Overall weighted PAF	..	..	..	..	41.2% (39.1–43.4)

PAF=population attributable fraction. RR=relative risk.

^*Weighted PAF is the relative contribution of each risk factor to the overall PAF when adjusted for communality.