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Table 1 Mean and standard deviation (SD), median and quartiles (25-75 centiles) of the key characteristics and p-value of the Wilcoxon rank-sum test comparing two groups, with or without pleural plaques (PP)

From: Osteopontin, asbestos exposure and pleural plaques: a cross-sectional study

Key characteristics

Without PP (N = 143)

With PP (N = 50)

p-value

 

Mean (SD)

Median (25-75 centiles)

Mean (SD)

Median (25-75 centiles)

 

Osteopontin

(ng/ml)

53.89

(19.57)

49.53

(42.50-57.64)

55.25

(20.86)

50.87

(40.78-66.22)

0.872

Age

(years)

62.90

(6.40)

61.94

(58.12-67.37)

65.78

(6.05)

64.71

(61.86 -68.33)

0.005

Time since last exposure (years)

13.71

(6.69)

14

(8 -18)

15.36

(5.50)

15.5

(12-20)

0.067

Time since first exposure (years)

42.20

(6.92)

42

(37-47)

45.12

(6.38)

45

(40-50)

0.010

Length of exposure

(years)

26.24

(6.97)

27

(22-30)

27.70

(5.67)

28

(25 - 29)

0.170

Cumulative exposure (ff/ml) × years

166.13

(120.2)

155.53

(44.79-299.2)

237.52

(102.3)

298.08

(155.5 -301.1)

0.001

Peak exposure

(ff/ml)

56.49

(59.7)

13.5

(13.5-135)

88.32

(60.3)

135

(13.5 -135)

0.002