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Table 5 Analysis on the association between PM2.5 Exposure (Per 10 μg/m3) and AD prevalence by subgroups

From: Associations between PM2.5 exposure and Alzheimer’s Disease prevalence Among elderly in eastern China

Variables

Group

HR (95% CI)

P values

Gender

Male

1.03 (1.01–1.12)

0.03

Female

0.94 (0.81–1.08)

0.10

Age group, years

60–64

0.96 (0.72–1.24)

0.13

65–69

1.04 (0.98–1.12)

0.15

70–74

1.11 (1.10–1.52)

0.02

75–85

1.12 (1.11–1.43)

0.02

Education level

Illiteracy

1.13 (1.09–1.20)

0.03

Primary school

1.01 (0.99–1.15)

0.04

Junior high school

0.98 (0.77–1.24)

0.23

Senior high school and above

0.86 (0.26–2.81)

0.31

Marital status

Living alone

1.01 (0.89–1.14)

0.52

Cohabitation

0.76 (0.58–1.00)

0.78

Occupation

Farmers

1.02 (1.00–1.16)

0.04

Blue-collar

1.09 (1.01–1.25)

0.02

White-collar

0.65 (0.43–1.12)

0.42

BMI, kg/m2

Normal, BMI < 24

0.89 (0.76–1.03)

0.36

Overweight, BMI ≥ 24 and < 28

1.04 (1.01–1.27)

0.04

Obese, BMI ≥ 28

1.03 (1.00–1.12)

0.04

  1. Abbreviations: HR relative hazard, 95% CI 95% confidence interval, AD Alzheimer's Disease