Table 4—

Prevalence of pleural plaques and asbestosis by asbestos exposure parameters in the Asbestos Post EXposure Survey#

Pleural plaquesAsbestosis
n (%)Mean±sdp-valuen (%)Mean±sdp-value
TSFE yrs
 1st quartile158 (11.7)76 (5.6)
 2nd quartile146 (16.6)66 (5.9)
 3rd quartile246 (27.9)121 (7.2)
 4th quartile332 (37.6)<0.0001112 (8.0)0.04
 Overall88244.5±8.6<0.000137543.6±8.10.005
Duration of exposure yrs
 1st quartile179 (20.3)71 (5.4)
 2nd quartile170 (19.3)88 (6.7)
 3rd quartile226 (25.6)100 (7.1)
 4th quartile307 (34.8)<0.0001116 (7.8)0.08
 Overall88229.3±11.1<0.000137529.5±10.40.01
Level of exposure
 Low10 (6.0)10 (6.0)
 Moderate95 (10.2)43 (4.6)
 High777 (17.5)<0.0001322 (7.3)0.01
 Overall882<0.00013750.01
CEI
 1st quartile150 (11.5)50 (3.8)
 2nd quartile200 (14.4)105 (7.6)
 3rd quartile228 (16.5)99 (7.2)
 4th quartile304 (20.6)<0.0001121 (8.2)<0.0001
 Overall882<0.0001375<0.0001
  • TSFE: time since first exposure; CEI: cumulative exposure index. #: n = 5,545; : trend test.