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Table 2 Summary of data collected from SidePak monitors located on wing landings, prison cells and whilst attached to staff members

From: Second-hand smoke in four English prisons: an air quality monitoring study

 

Sample locations

PM2.5

Wing landings

Prison cellsb

Attached to staff membersa

Total Datasets (average duration, hours)

48 (6.5)

13 (4.88)

 

Arithmetic Mean (μg/m3)

40.08

103.1

 Standard Deviation

57.08

237.47

 Range

0 – 1124

0 – 2684

 Median

30.78

27.52

Geometric Mean (μg/m3)

32.57

59.2

 Interquartile Range

16.40 - 35.85

10.49 – 90.63

 Non-Smoking Locations (average duration, hours)

6 (5.18)

8 (5.12)

  Arithmetic Mean (μg/m3)

5.90

16.98

   Standard Deviation

2.90

15.46

   Range

0 – 22

1 – 102

   Median

5.71

13.39

  Geometric Mean (μg/m3)

5.58

14.88

   Interquartile Range

5.29 – 7.77

6.9 – 25.82

 Smoking Locationsc(average duration, hours)

42 (6.66)

5 (4.51)

22 (4.18)

  Arithmetic Mean (μg/m3)

43.87

226.16

23.51

   Standard Deviation

58.95

333.08

34.01

   Range

1 – 1124

8- 2684

2 – 608

   Median

32.86

162.90

19.04

  Geometric Mean (μg/m3)

35.57*

122.52*

18.57

   Interquartile Range

18.9 – 36.97

81.61 – 163.14

11.37 – 18.59

  1. *Two-sample t-test comparing smoking and non-smoking locations, denotes significance (p < 0.001)
  2. aAll staff members sampled worked on locations where smoking was permitted in cells only
  3. bAll prison cells sampled were located on wings where smoking was permitted in cells only
  4. cSmoking locations were those where smoking was permitted in cells only