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Table 3 Summary statistics and Spearman correlations of 2-year mean air pollutants

From: Effects of long-term PM2.5 exposure on metabolic syndrome among adults and elderly in Guangdong, China

 

Summary statistics

Spearman correlation coefficients

 

Mean

Median

Minimum

Maximum

IQR

PM2.5

PM10

SO2

NO2

O3

PM2.5 (μg/m3)

37.17

38.30

27.99

46.96

8.84

1.00

0.71*

0.52*

0.60*

-0.49*

PM10 (μg/m3)

55.43

55.09

42.17

67.33

7.58

 

1.00

0.63*

0.75*

-0.51*

SO2 (μg/m3)

16.12

15.92

9.31

22.28

5.44

  

1.00

0.37*

-0.35*

NO2 (μg/m3)

25.98

23.07

7.94

62.68

18.07

   

1.00

-0.68*

O3 (μg/m3)

56.23

56.96

40.54

68.83

7.38

    

1.00

  1. PM2.5 Particulate matter ≤ 2.5 µm, PM10 Particulate matter < 10 µm, SO2 Sulfur dioxide, NO2 Nitrogen dioxide, O3 Ozone
  2. Note: Spearman correlation coefficients, *:P < 0.05
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Environmental Health

ISSN: 1476-069X