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Table 3 Descriptive statistics of daily air pollution and outpatient hospital visits in the study area separated by the burning (January–April) and non-burning (May–December) months during 2014–2017

From: Ambient particulate matter and biomass burning: an ecological time series study of respiratory and cardiovascular hospital visits in northern Thailand

 

Burning

Non-Burning

 

Min

Max

Mean

SD

Min

Max

Mean

SD

Air pollutants

 PM10 (μg/m3)

5.4

371.1

74.6

42.2

1.6

137.4

26.0

13.7

 O3 (ppb)

3.6

135.1

59.5

16.9

2.0

92.4

31.7

12.8

 CO (ppm)

0

2.9

0.76

0.36

0

1.65

0.48

0.25

 NO2 (ppb)

0.1

42.4

10.8

6.2

0

29.6

5.7

3.8

 Temperature (°C)

7.8

35.8

25.4

4.1

9.3

39.0

26.2

2.8

 Relative Humidity (%)

28.0

100.0

64.9

12.1

34.5

100.0

80.7

9.2

Outpatient Hospital Visits (n)

 Chronic Lower Respiratory  Disease

6

100

41.0

21.2

3

120

34.7

18.9

  < 65 years

0

55

12.6

10.3

0

52

11.1

8.2

  ≥ 65 years

1

46

15.9

9.0

0

44

12.5

8.0

 Male

1

53

19.5

10.5

0

64

17.1

9.6

 Female

2

66

21.5

11.7

0

65

17.5

10.3

 Ischaemic Heart Disease

0

19

5.1

3.7

0

26

5.4

3.8

  < 65 years

0

9

2.3

2.0

0

13

2.3

2.0

  ≥ 65 years

0

16

2.9

2.0

0

18

3.1

2.5

 Male

0

12

2.7

2.2

0

13

2.9

2.4

 Female

0

14

2.5

2.1

0

15

2.5

2.1

 Cerebrovascular Disease

0

39

9.4

6.5

0

39

9.9

6.6

  < 65 years

0

20

4.5

3.4

0

22

4.7

3.6

  ≥ 65 years

0

19

4.9

3.8

0

21

5.2

3.8

 Male

0

18

5.2

3.7

0

21

5.5

3.9

 Female

0

22

4.2

3.4

0

18

4.4

3.4