Table 3 HRs for incidence of dementia according to severity of anemia

Severity of anemia^b

Total patients

Dementia,

n (%)

Unadjusted HR

Model 1

Model 2

None

31,683

594 (1.87)

1.00

1.00

1.00

Mild

5392

126 (2.34)

1.27 (1.05–1.54)

1.20 (0.99–1.46)

1.19 (0.98–1.45)

Moderate

790

24 (3.04)

1.68 (1.12–2.53)

1.48 (0.98–2.24)

1.47 (0.97–2.21)

Severe

35

3 (8.57)

5.99 (1.92–18.61)

5.65 (1.82–18.59)

5.72 (1.84–17.81)

p Value for trend

< 0.001

0.003

0.003