Table 5.

Standardized incidence ratios (SIR) for hospitalization of systemic lupus erythematosus in women by occupation from census 1970.

Occupation	Followup 1970–1979				Followup 1980–1999				Followup 2000–2008
Occupation	Obs	SIR	95% CI		Obs	SIR	95% CI		Obs	SIR	95% CI
Technical, chemical, physical, biological workers	28	0.72	0.48	1.04	92	0.67	0.54	0.83	44	0.78	0.57	1.05
Nurses	60	0.72	0.55	0.92	191	0.66	0.57	0.76	73	0.68	0.54	0.86
Assistant nurses	146	0.77	0.65	0.90	653	0.95	0.88	1.03	248	1.03	0.90	1.16
Other health and medical workers	35	0.68	0.47	0.94	200	1.07	0.92	1.23	108	1.42	1.16	1.71
Teachers	95	0.62	0.50	0.75	366	0.69	0.62	0.76	107	0.54	0.44	0.65
Religious, juridical, other social-science-related workers	60	1.11	0.85	1.43	284	1.69	1.50	1.90	103	1.78	1.45	2.15
Artistic workers	—				21	0.52	0.32	0.79	—
Journalists	—				—				24	3.50	2.24	5.22
Administrators and managers	69	2.46	1.91	3.11	125	1.56	1.30	1.86	25	1.09	0.70	1.61
Clerical workers	599	0.98	0.91	1.07	2056	1.01	0.96	1.05	940	1.25	1.17	1.33
Sales agents	101	1.95	1.59	2.37	137	0.91	0.76	1.08	24	0.56	0.36	0.83
Shop managers and assistants	176	0.60	0.51	0.70	677	0.72	0.66	0.77	194	0.69	0.60	0.80
Farmers	38	0.45	0.32	0.62	230	0.92	0.80	1.04	21	0.37	0.23	0.57
Gardeners and related workers	49	1.86	1.37	2.46	50	0.59	0.44	0.78	16	0.76	0.43	1.23
Drivers	38	2.26	1.60	3.11	56	1.05	0.79	1.36	34	1.95	1.35	2.72
Postal and communication workers	108	1.32	1.08	1.60	355	1.30	1.17	1.44	105	1.15	0.94	1.39
Textile workers	42	0.43	0.31	0.58	192	0.63	0.54	0.72	77	0.90	0.71	1.12
Mechanics and iron and metalware workers	45	1.16	0.85	1.56	112	0.82	0.68	0.99	45	0.98	0.72	1.32
Electrical workers	10	0.47	0.22	0.87	118	1.54	1.27	1.84	35	1.30	0.91	1.81
Wood workers	16	2.21	1.26	3.59	—				—
Printers and related workers	10	0.60	0.28	1.10	79	1.52	1.20	1.90	15	0.90	0.50	1.48
Food manufacture workers	10	0.35	0.17	0.65	64	0.72	0.55	0.92	47	1.77	1.30	2.35
Glass, ceramic, tile workers	33	1.04	0.72	1.46	84	0.80	0.64	1.00	27	0.81	0.54	1.19
Packers, loaders, warehouse workers	33	0.62	0.43	0.87	201	1.21	1.05	1.40	19	0.38	0.23	0.59
Engine and motor operator workers	—				28	1.90	1.26	2.76	—
Public safety and protection workers	9	2.33	1.06	4.45	26	2.15	1.40	3.15	16	4.31	2.46	7.01
Cooks and stewards	69	0.67	0.52	0.85	158	0.51	0.43	0.59	39	0.49	0.35	0.67
Home helpers	92	0.49	0.39	0.60	596	0.98	0.90	1.06	161	0.88	0.75	1.03
Waiters	47	0.73	0.53	0.97	251	1.29	1.13	1.46	64	1.34	1.03	1.71
Building caretakers and cleaners	128	0.68	0.57	0.81	576	1.05	0.97	1.14	146	1.08	0.91	1.26
Hairdressers	43	1.24	0.90	1.67	83	0.65	0.51	0.80	45	0.88	0.64	1.18
Launderers and dry cleaners	24	0.62	0.40	0.93	144	1.26	1.06	1.48	30	0.97	0.66	1.39
Others and unemployed	3865	1.15	1.11	1.18	15925	1.05	1.03	1.06	9146	1.01	0.99	1.03
All	6104		Ref		24183		Ref		12 003		Ref

Obs: observed; CI: confidence interval; Ref: reference values. For values in bold type 95% CI does not include 1.00.