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. Author manuscript; available in PMC: 2021 May 27.
Published in final edited form as: J Occup Environ Med. 2020 Jan;62(1):e1–e6. doi: 10.1097/JOM.0000000000001760

TABLE 4.

Standardized Mortality Ratios and Standardized Rate Ratios for Select Underlying Causes of Death, Stratified by Presence of Pleural and Parenchymal Abnormalities on Chest Radiographs (CXR)

Cause CXR Category Obs Exp SMR (95% CI) SRR (95% CI)
Lung cancer Pleural 44 32.98 1.33 (0.97, 1.79) 1.73 (1.15, 2.61)
No pleural 78 104.01 0.75 (0.59, 0.94) 1
Parenchymal 14 3.88 3.61 (1.97, 6.06) 3.94 (2.10, 7.38)
No parenchymal 108 133.11 0.81 (0.67, 0.98) 1
Mesothelioma Pleural 6 0.75 8.27 (3.04, 18.01) 2.39 (0.15, 28.14)
No pleural 7 1.68 4.18 (1.68, 8.60) 1
Parenchymal 0 0.09 0 (0.00, 41.75) NR
No parenchymal 13 2.31 5.62 (2.99, 9.61) 1
Asbestosis Pleural 41 0.18 230.74 (165.56, 313.03) 2.52 (1.39, 8.93)
No pleural 21 0.3 69.07 (42.74, 105.58) 1
Parenchymal 9 0.02 383.78 (175.49, 728.53) 38.62 (6.16, 241.24)
No parenchymal 53 0.45 115.65 (86.62, 151.27) 1

Statistically significant (P < 0.05) SMRs and SRRs are in bold font. CI, confidence interval; SMRs, standardized mortality ratios; SRRs, standardized rate ratios. Person-years for each CXR category: pleural abnormality 14,162; no pleural abnormality 101,684; parenchymal abnormality 1,723; no parenchymal abnormality 114,123.