Table 3—

Prevalence of pleural plaques and asbestosis by age, smoking status, body mass index and main occupational status# in the Asbestos Post EXposure Survey

Subjects nPleural plaquesAsbestosis
n (%)Mean±sdp-valuen (%)Mean±sdp-value
Age
 <60 yrs148 (12.6)74 (6.3)
 60–75 yrs661 (15.9)271 (6.5)
 ≥75 yrs73 (35.3)<0.00130 (14.5)<0.001
 Overall88265.3±6.3<0.001+37564.9±6.70.01+
Smoking status
 Nonsmokers199 (14.5)80 (5.8)
 Former smokers360 (17.4)150 (7.3)
 Smokers54 (16.5)0.0730 (9.2)0.06
 Unknown269 (15.2)115 (6.5)
Body mass index
 Underweight4 (16.8)3 (20)
 Normal weight161 (26.7)73 (7.6)
 Overweight305 (16.1)120 (6.3)
 Obesity143 (18.2)0.459 (7.5)0.1
 Unknown269 (14.2)120 (6.3)
 Overall61327.5±3.925527.3±4.1
Main jobs
 Insulation workers13650 (36.8)14 (10.3)
 Freight handlers21146 (21.8)29 (13.7)
 Plumbers and pipe fitters40082 (20.5)28 (7.0)
 Sheet-metal workers23947 (19.7)23 (9.6)
 Agricultural- or industrial-machinery mechanics and fitters581106 (18.2)34 (5.9)
 Metal smelters, casters and rolling-mill operators21835 (16.1)15 (6.9)
 Building and related electricians33153 (16.0)20 (6.0)
 Welders and flame cutters22836 (15.8)20 (8.8)
 Bricklayers and stonemasons34741 (11.8)25 (7.2)
 Motor-vehicle mechanics and fitters37633 (8.8)18 (4.8)
Main industrial activities
 Ship building and repairs13950 (36.0)16 (11.5)
 Cargo handling17239 (22.7)22 (12.8)
 Electricity production14331 (21.7)14 (9.8)
 Basic iron and steel manufacture48892 (18.9)35 (7.2)
 Metalworking: boilermaking26847 (17.5)13 (4.9)
 Installation of heating and air conditioning equipment19229 (15.1)9 (4.7)
 Installation of electrical wiring and fittings17420 (11.5)7 (4.0)
 Complete building construction work38430 (7.8)24 (6.3)
 Motor vehicle maintenance and repairs32025 (7.8)15 (4.7)
 Iron casting16512 (7.3)3 (1.8)
  • #: defined as the job or industrial activities held longest by the subjects; : n = 5,545; +: trend test.