Table 6.

Genotype and allele frequencies of TNFβ (A+252G) polymorphism in RA patients in relation to clinical features.

Genotype/allele	Morning stiffness duration				P-value	Rheumatoid factor				P-value	Type of arthritis				P-value
	1–3 hr (N = 81)		0–< 1 hr (N = 25)			Positive (N = 82)		Negative (N = 24)			Polyarthritis N = 93		Oligoarthritis N = 13
	N	%	N	%		N	%	N	%		N	%	N	%
GG	18	22.22	9	36	0.19	24	29.27	3	12.50	0.11	22	23.65	5	38.46	0.30
GA	37	45.68	10	40	0.65	36	43.90	11	45.83	0.99	41	44.09	6	46.15	0.99
AA	26	32.10	6	24	0.62	22	26.83	10	41.67	0.20	30	32.26	2	15.39	0.33
G-allele	73	45.06	28	56	0.19	84	51.22	17	35.42	0.07	85	45.70	16	61.54	0.14
A-allele	89	54.94	22	44	0.19	80	48.78	31	64.58	0.07	101	54.30	10	38.46	0.14

Note: N, number of subjects.