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Table 2 Descriptive statistics for daily meteorological and air pollutant levels (lag0) in Gothenburg, Sweden (1 January 1985–31 December 2010)

From: The effect of secondary inorganic aerosols, soot and the geographical origin of air mass on acute myocardial infarction hospitalisations in Gothenburg, Sweden during 1985–2010: a case-crossover study

     

Percentiles

 
 

No. days missing data

Mean

SD

Range

25th

50th

75th

IQR

All year (9496 days)

        

Temperature (°C)

146

8.5

7.2

−22.0 − 26.2

3.3

8.4

14.4

11.1

Relative humidity (%)

637

77.4

12.5

15.0 − 99.9

69.8

79.4

87.1

17.3

PM10 (μg.m−3)

2004

15.9

9.2

5 − 78.1

9.6

14.0

20.0

10.4

PMion (μg.m−3)

899

6.6

5.6

0.4 − 63.6

3.0

5.0

8.4

5.4

PMrest (μg.m−3)

2373

10.0

8.0

0.0 − 70.2

4.2

8.2

13.2

9.0

SO4 2− (μg.m−3)

262

1.0

1.0

0.0 − 18.5

0.4

0.7

1.2

0.8

Total NO3 (μg.m−3)

746

0.6

0.7

0.0 − 12.6

0.2

0.4

0.8

0.6

Total NH4 + (μg.m−3)

696

1.0

1.0

0.0 − 12.3

0.4

0.7

1.3

0.9

PM2.5 (μg.m−3)

7718

7.7

4.5

0.6 − 40.9

4.7

6.7

9.3

4.6

Soot (μg.m−3)

319

2.6

3.6

0.8 − 48.2

0.8

1.2

2.9

1.7

Warm period (4758 days)

        

Temperature (°C)

47

13.8

4.6

−1.1 − 26.2

10.9

14.3

16.9

6.1

Relative humidity (%)

304

72.2

12.3

32.0 − 99.0

64.7

73.5

81.2

16.5

PM10 (μg.m−3)

973

15.4

8.7

5 − 76.0

9.5

13.5

19.0

9.5

PMion (μg.m−3)

433

6.5

5.1

0.5 − 63.6

3.2

5.0

8.3

5.1

PMrest (μg.m−3)

1106

9.5

7.3

0.0 − 65.0

4.3

7.8

12.4

8.0

SO4 2− (μg.m−3)

126

1.0

0.9

0.0 − 13.3

0.4

0.7

1.2

0.8

Total NO3 (μg.m−3)

347

0.6

0.7

0.0 − 9.9

0.2

0.4

0.7

0.5

Total NH4 + (μg.m−3)

333

1.1

0.9

0.0 − 9.6

0.5

0.8

1.3

0.8

PM2.5 (μg.m−3)

3845

7.2

4.2

0.9 − 35.6

4.5

6.3

8.6

4.1

Soot (μg.m−3)

168

1.7

2.1

0.8 − 23.7

0.8

0.8

1.9

1.1

Cold period (4738 days)

        

Temperature (°C)

99

3.1

5.0

−22.0 − 16.3

0.2

3.5

6.4

6.2

Relative humidity (%)

333

82.7

10.3

15.0 − 99.9

77.4

84.8

90.1

12.7

PM10 (μg.m−3)

1031

16.6

9.7

5 − 78.1

9.7

14.6

20.8

11.1

PMion (μg.m−3)

466

6.7

6.0

0.4 − 63.6

2.8

5.0

8.6

5.8

PMrest (μg.m−3)

1267

10.6

8.6

0.0 − 70.2

4.0

8.6

14.1

10.1

SO4 2− (μg.m−3)

136

1.1

1.1

0.0 − 18.5

0.4

0.7

1.3

0.9

Total NO3 (μg.m−3)

399

0.6

0.7

0.0 − 12.6

0.2

0.4

0.8

0.6

Total NH4 + (μg.m−3)

363

1.0

1.1

0.0 − 12.3

0.3

0.6

1.3

1.0

PM2.5 (μg.m−3)

3873

8.2

4.8

0.6 − 40.9

5.0

7.0

10.0

5.0

Soot (μg.m−3)

151

3.5

4.5

0.8 − 48.2

0.8

2.0

4.2

2.2

  1. SD: Standard deviation, IQR: Interquartile range.
  2. Warm period: April − September, cold period: October − March.
  3. PM10 and PMrest available from 1990–2010 and PM2.5 available from 2006–2010.