Table 2 Hazard ratio of Alzheimer’s disease and vascular dementia per 10 µg/m³ increase in PM₁₀

HR^*

(95% CI)

HR^*

(95% CI)

Crude

0.94

(0.94, 0.95)

1.03

(1.01, 1.06)

Adjusted^*

0.99

(0.98, 1.00)

1.05

(1.02, 1.08)

Quintile

 Q1(< 42.9)

1.00

(reference)

1.00

(reference)

 Q2(42.9 ≤ 47.7)

1.00

(0.98, 1.01)

1.10

(1.05–1.16)

 Q3(47.7 ≤ 53.4)

1.01

(1.00, 1.03)

1.11

(1.06, 1.17)

 Q4(≥ 53.4)

0.99

(0.97, 1.00)

1.04

(0.98, 1.10)