Table 3

Genotype frequencies of TNF α-308 gene polymorphism in asthma and control groups

Reference	Asthma group				Control group
	% with TNF2	Genotype (n)			% with TNF2	Genotype (n)
	% with TNF2	TNF2/2	TNF2/1	TNF1/1	% with TNF2	TNF2/2	TNF2/1	TNF1/1
NA, not available.
Moffatt⁶	30	8	36	44	18	12	89	211
Chagni⁹	20	100		150	15	76		176
Li Kam Wa¹⁰	26	21	87	139	21	13	106	190
Louis¹¹	16	2	27	69	15	0	31	64
Winchester¹²	29	2	11	13	27	20	149	522
Zhu¹³	17	0	4	8	14	2	25	81
Witte¹⁵	18	4	67	164	14	6	55	212
Buckova¹⁶	17.2	3	46	102	12.9	1	38	116
Gao¹⁷	42	26	52	47	33	11	41	44
Di Somma¹⁸	40	NA			22	NA
Beghe¹⁹	12	1	32	109	11	1	8	36
Sandford²¹	12	0	26	80	7	0	16	102
Shin²²	5	2	50	482	12	2	37	131
Wang²³	14	2	49	140	7	0	18	111
Bilolikar²⁴	30	8	50	50	21	9	46	94