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. Author manuscript; available in PMC: 2017 Aug 1.
Published in final edited form as: Am J Ind Med. 2016 Jun 27;59(8):630–643. doi: 10.1002/ajim.22622

TABLE V.

Standardized Rate Ratios for Lung Cancer Stratified by Categories of 10-Year Lagged Employment Duration in Finishing Jobs and in Finishing Jobs Involving Cutting and Similar Activitiesa,b

Finishing jobs
Finishing jobs involving cutting and similar activities
Employment duration (days)c Obs SRR 95% CI Trend slope, P-value Employment duration (days)c Obs SRR 95% CI Trend slope, P-value
0 32 Referent 0 72 Referent
1–<227 24 1.96 0.72–5.32 1–<110 11 1.28 0.46–3.51
227–<525 24 1.92 1.04–3.53 110–<275 11 1.01 0.34–3.02
≥525 25 3.22 0.95–11.0 1.51E-06, <0.0001 ≥275 11 0.60 0.30–1.18 −8.64E-07, <0.0001

OBS, observed deaths; SRR, standardized rate ratio; CI, confidence interval.

a

Includes trachea, bronchus, and lung cancer.

b

Analysis is restricted to cohort members who only held jobs that we could determine if were in finishing.

c

Cut-points were selected to obtain four categories with an approximately equal number of lung cancer deaths in each category with an employment duration greater than zero.