Table 2 Poisson regressions on number of health knowledge categories and sources, IRR (95% CI)

eth#agg

 NO, young

1 [Reference]

1 [Reference]

 NO, middle

0.98***

0.98–0.99

0.95***

0.94–0.95

 NO, old

0.83***

0.81–0.85

0.80***

0.79–0.81

 Yes, young

2.37***

2.19–2.57

2.58***

2.43–2.73

 Yes, middle

2.32***

2.15–2.51

2.47***

2.33–2.62

 Yes, old

1.88***

1.69–2.10

2.12***

1.96–2.29

eth#gender

 No, no

1 [Reference]

1 [Reference]

 No, yes

1.00

0.99–1.00

0.99***

0.99–1.00

 Yes, no

1.00

0.98–1.02

1.00

0.99–1.02

eth#edu

 No, no

1 [Reference]

1 [Reference]

 No, yes

1.23***

1.20–1.27

1.24***

1.21–1.27

 Yes, no

0.80***

0.77–0.84

0.83***

0.80–0.86

eth#huk

 No, no

1 [Reference]

1 [Reference]

 No, yes

0.92***

0.91–0.93

0.93***

0.93–0.94

 Yes, no

1.08***

1.05–1.11

1.08***

1.06–1.11

eth#intpv

 No, no

1 [Reference]

1 [Reference]

 No, yes

0.96***

0.96–0.97

0.98***

0.98–0.99

 Yes, no

1.06***

1.04–1.09

1.02**

1.00–1.04

eth#mar

 No, no

1 [Reference]

1 [Reference]

 No, yes

1.02***

1.01–1.03

1.00

0.99–1.00

 Yes, no

0.97**

0.95–0.99

1.03***

1.01–1.04

eth#zon1

 No, no

1 [Reference]

1 [Reference]

 No, yes

3.89***

3.76–4.01

3.58***

3.49–3.67

 Yes, no

1.06**

1.01–1.11

1.13***

1.09–1.18

eth#zon2

 No, no

1 [Reference]

1 [Reference]

 No, yes

3.54***

3.43–3.65

3.51***

3.43–3.60

 Yes, no

1.33***

1.26–1.39

1.15***

1.12–1.19

eth#zon3

 No, no

1 [Reference]

1 [Reference]

 No, yes

3.43***

3.32–3.54

3.39***

3.31–3.47

 Yes, no

1.33***

1.28–1.38

1.24***

1.20–1.28

eth#zon4

 No, no

1 [Reference]

1 [Reference]

 No, yes

3.94***

3.82–4.07

3.74***

3.65–3.83

N

205,990

189,345