Table 2. SIRs of urinary bladder cancer for men in the two and three consecutive censuses.

Occupation	1960–1970 censuses					1960–1970–1980 censuses
	O	SEI-adjusted SIRa	95% CIa	Corrected SIRb	95% CIb	O	SEI-adjusted SIRa	95% CIa	Corrected SIRb	95% CIb
Physicians	95	1.33	1.07–1.61	1.33	1.07–1.61	53	1.14	0.85–1.47	1.14	0.85–1.47
Administrators and managers	414	1.06	0.96–1.17	1.06	0.96–1.17	118	1.02	0.84–1.21	1.02	0.84–1.21
Clerical workers	423	1.15	1.04–1.26	1.15	1.04–1.26	133	1.15	0.96–1.35	1.15	0.96–1.35
Sales agents	744	1.16	1.08–1.25	1.10	1.02–1.18	272	1.17	1.03–1.31	1.10	0.98–1.24
Drivers	838	1.07	1.00–1.14	1.00	0.93–1.07	305	1.08	0.96–1.21	1.01	0.90–1.13
Mechanics. iron and mctalwarc workers	1168	1.06	1.00–1.12	0.97	0.92–1.0.3	423	1.02	0.93–1.12	0.94	0.85–1.03
Waiters	19	1.82	1.09–2.73	1.30	0.78–1.95	4	1.11	0.29–2.47	0.79	0.21–1.76
Chimney sweeps	22	1.61	1.01–2.35	1.19	0.75–1.74	14	2.03	1.11–3.23	1.50	0.82–2.39
Hairdressers	62	1.14	0.88–1.45	1.00	0.76–1.26	33	1.35	0.9.1–1.84	1.17	0.81–1.60
Launderers and dry cleaners	67	1.16	0.90–1.46	1.03	0.80–1.29	19	0.97	0.58–1.45	0.86	0.51–1.28
All	11 432	1.00	0.98–1.02	1.00	0.98–1.02	4.192	1.00	0.97–1.0.1	1.00	0.97–1.03

O, observed cases; bold type, 95% CI does not include 1.00.

^aAdjusted for age, period and socioeconomic status.

^bSmoking corrected.