Table 4 Odds ratio, 95% confidence interval and prevalence of chronic diseases comparing the higher quartiles with the lowest quartile of blood Mn level after adjusting covariates (Q1 vs Q2–4) ^a

0.68 (0.50, 0.94)

0.65 (0.46, 0.92)^b

7.6 (0.9)

5.3 (0.5)

0.02^b

0.65 (0.46, 0.92)

0.62 (0.41, 0.92)^c

6.8 (1.0)

4.6 (0.5)

0.02^c

1.03 (0.85, 1.24)

1.15 (0.93, 1.42)^d

25.6 (1.6)

26.2 (1.0)

0.77^d

1.00 (0.46, 2.16)

1.04 (0.45, 2.40)^c

1.2 (0.4)

1.2 (0.2)

0.99^c

1.03 (0.48, 2.20)

1.11 (0.51, 2.42)^c

0.8 (0.2)

0.8 (0.2)

0.94^c