. 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 A3.

Effect of categorical duration adjustment on excess relative rate estimates from standardized incidence ratio model of bladder cancer in workers from a chemical manufacturing plant

	ERR (from SIR) (lag = 10 yr)

	Loglinear model

Cumulative rank (unit-days)²	Without duration term -2ln(L)=1083.035	With duration term -2ln(L)=1082.302	Ratio with/without duration term^a

<11 000	0.082	0.17	2.1
11 000–<27 000	2.33	3.71	1.6
27 000–<48 000	4.31	6.75	1.6
48 000+	5.44	9.65	1.8

As applied in model 5, Table 2

Notes: Models with cumulative o-toluidine rank in 4 strata (s1Tol, s2Tol, s3Tol, s4Tol).