Table 4 Prevalence of different systems for heating and cooking food in the dwellings of enrolled children

 Wood/Pellet

6.9

7.2

12.4

1.4

1.5

6.2

<0.001

 Diesel/Kerosene

0.6

1.4

5.1

2.6

10.1

3.9

<0.001

 Gas

30.2

83.5

78.3

92.4

57.7

67.7

<0.001

 Electricity

3.3

8.0

2.7

2.9

0.9

3.6

<0.001

 District heating

59.1

0

1.1

0

29.8

18.5

<0.001

 Wood/Pellet

6.0

2.5

7.2

2.4

0.4

3.8

<0.001

 Gas/kerosene

1.2

5.0

1.3

3.3

1.3

2.4

0.220

 Electricity

0.4

2.1

1.3

1.0

0.9

1.1

0.500

Fireplaces (%)

23.6

37.2

34.9

13.8

7.0

23.7

<0.001

Gas boiler (%)

11.2

3.3

8.9

17.1

18.5

11.6

<0.001

 Electricity/Induction

21.1

13.6

8.0

9.7

5.4

11.7

<0.001

 Gas

78.2

85.7

89.2

90.3

94.6

87.4

<0.001

 Wood/Charcoal

0.8

0.8

2.8

0

0

0.9

0.005