TABLE 2.

All Included Cases and Controls of Rheumatoid Arthritis (RA)

	Cases, N	Controls, N	OR	95% CI
Total
Unexposed	16,550	33,312	1
Exposed	803	1394	1.17	1.07–1.28
Number of years with exposure
0 years	16,550	33,312	1
≤1 years	136	286	0.96	0.78–1.18
1.01–5 years	213	353	1.22	1.03–1.46
5.01–10 years	266	467	1.16	0.99–1.35
>10 years	188	288	1.33	1.10–1.61
Men
Unexposed	3893	589	1
Exposed	7977	987	1.22	1.10–1.36
Number of years with exposure
0 years	3893	7977	1
≤1 years	95	184	1.05	0.82–1.35
1.01–5 years	136	220	1.27	1.02–1.58
5.01–10 years	205	355	1.18	0.99–1.41
>10 years	153	288	1.38	1.12–1.71
Women
Unexposed	12,657	25,335	1
Exposed	214	407	1.05	0.89–1.25
Number of years with exposure
0 years	12,657	25,335	1
≤1 years	41	102	0.81	0.56–1.16
1.01–5 years	77	133	1.16	0.87–1.54
5.01–10 years	61	112	1.09	0.80–1.50
>10 years	35	60	1.17	0.77–1.77

Bold numbers indicate statistical significance (P < 0.05).

The data are also shown for both men and women and grouped according to years of silica dust exposure. OR, odds ratio.