. Author manuscript; available in PMC: 2022 Sep 1.

Published in final edited form as: Am J Ind Med. 2021 Jun 10;64(9):758–770. doi: 10.1002/ajim.23265

Table 1.

Comparison of study findings with previously published results for bladder cancer incidence associated with o-toluidine cumulative exposure rank (10-year lag) in workers from a chemical manufacturing plant (n=1,875)

	Present Analysis^a	Published analysis^b

Bladder cancer cases (person-years)	46 (47,640)	37 (35,155)

Overall SIR, lag = 10 yr (95% CI)	2.58 (1.91, 3.46)	2.87 (2.02, 3.96)

SIR by cumulative rank (unit-days)^c
<11 000	1.08	1.32
11 000–<27 000	3.33	3.37
27 000–<48 000	5.31	5.44
48 000+	6.44	6.13

From single Poisson regression model, no intercept, unadjusted for healthy worker survival effect.

Table 2, Carreón et al., 2014.⁴

Derived from unit-years by multiplication by 365.

Abbreviations: CI, confidence interval; SIR, standardized incidence ratio.