Table 3. Stratified analyses between rs878081 polymorphism and the risk of rheumatoid arthritis stratified by factors.

Variable	Rs878081 (case/control)			OR (95%CI); P
	CC	CT	TT	CT vs CC	TT vs CC	CT+TT vs CC	TT vs CT+CC
Sex
Male	73/88	51/51	10/7	1.21	1.72	1.27	1.60
				(0.73–1.98)	(0.62–4.75)	(0.79–2.04)	(0.59–4.34)
				0.461	0.294	0.327	0.354
Female	83/82	58/59	23/12	0.96	1.87	1.13	1.92
				(0.60–1.54)	(0.88–4.00)	(0.73–1.75)	(0.92–4.00)
				0.865	0.106	0.595	0.083
Age
≥55	80/84	61/44	15/6	1.44	2.59	0.95	2.27
				(0.88–2.36)	(0.96–7.01)	(0.60–1.48)	(0.85–6.02)
				0.150	0.061	0.807	0.100
<55	76/86	48/66	18/13	0.82	1.56	1.60	1.70
				(0.51–1.33)	(0.72–3.40)	(1.00–2.55)	(0.80–3.60)
				0.425	0.259	0.051	0.168
Smoking
Yes	77/69	35/45	7/7	0.69	0.89	0.72	1.02
				(0.40–1.19)	(0.30–2.65)	(0.43–1.22)	(0.35–3.00)
				0.181	0.827	0.224	0.974
No	79/101	74/65	26/12	1.45	2.76	1.66	2.35
				(0.93–2.26)	(1.31–5.81)	(1.09–2.52)	(1.15–4.82)
				0.010	0.007	0.018	0.020
Alcoholism
Yes	50/53	30/30	7/3	1.06	2.47	1.19	2.42
				(0.56–2.00)	(0.61–10.09)	(0.65–2.18)	(0.61–9.68)
				0.858	0.207	0.578	0.212
No	106/117	79/80	26/16	1.08	1.78	1.21	1.73
				(0.72–1.62)	(0.90–3.49)	(0.82–1.77)	(0.90–3.33)
				0.714	0.096	0.334	0.101

Bold type indicates statistically significant.