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Table 1 (A) Daily environmental variables; and (B) Spearman correlation coefficients for these variables

From: How air pollution influences clinical management of respiratory diseases. A case-crossover study in Milan

 

Warm season

Cold season

Total

Percentiles

 

(April-September)

(October-March)

A.

Mean

SD

Mean

SD

Mean

SD

25th

50th

75th

IQR

 C 6 H 6

1.41

0.72

3.99

2.06

2.70

2.01

1.18

2.05

3.78

2.60

 C 9 H 6 N 2 O 2

5.23

3.36

12.51

7.84

8.87

7.04

3.90

6.83

11.86

7.96

 C 8 H 10

2.35

1.85

6.44

4.84

4.39

4.19

1.62

3.09

5.86

4.24

 PM 10

31.08

11.96

63.13

33.17

47.08

29.62

26.92

37.00

60.15

33.23

 PM2.5

16.20

9.70

49.44

28.35

32.80

26.92

13.00

22.00

47.00

34.00

 SO 2

3.75

2.69

4.51

4.25

4.13

3.57

1.04

3.61

6.00

4.96

 NO 2

89.47

28.01

115.79

34.23

102.62

33.91

79.71

99.43

121.71

42.00

 CO

1.03

0.27

1.95

0.60

1.49

0.65

1.00

1.33

1.86

0.86

 O 3

109.42

33.69

39.05

24.70

74.29

45.95

32.67

68.50

111.67

79.00

B.

C 6 H 6

C 9 H 6 N 2 O 2

C 8 H 10

PM 10

PM 2.5

SO 2

NO 2

CO

O 3

 

WARM SEASON (April-September)

 C 6 H 6

1.00

0.88

0.87

0.49

0.43

−0.13

0.61

0.49

0.11

 

 C 9 H 6 N 2 O 2

0.88

1.00

0.84

0.44

0.40

0.01

0.58

0.47

0.06

 

 C 8 H 10

0.78

0.90

1.00

0.45

0.40

−0.01

0.65

0.57

0.00

 

 PM 10

0.77

0.67

0.58

1.00

0.75

−0.08

0.52

0.52

0.21

 

 PM2.5

0.76

0.63

0.54

0.96

1.00

−0.17

0.51

0.54

−0.01

 

 SO 2

0.51

0.35

0.30

0.46

0.44

1.00

−0.20

−0.20

0.17

 

 NO 2

0.67

0.70

0.64

0.54

0.48

0.30

1.00

0.67

0.12

 

 CO

0.78

0.69

0.61

0.60

0.60

0.34

0.59

1.00

−0.18

 

 O 3

−0.44

−0.27

−0.24

−0.39

−0.46

−0.33

0.07

−0.41

1.00

 

COLD SEASON (October-March)

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Respiratory Research

ISSN: 1465-993X

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