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Table 1 Genotype distribution and relative allele frequencies of -308 polymorphism of TNF-alph a gene in Chinese with URSA (n = 132) and controls (n = 152).

From: Association between -238 but not -308 polymorphism of Tumor necrosis factor alpha (TNF-alpha)v and unexplained recurrent spontaneous abortion (URSA) in Chinese population

Group No. Genotype frequency (%) Allele frequency (%)
   AA AG GG A G
URSA 132 0 (0) 22 (16.7) 110 (83.3) 22 (8.3) 242 (91.7)
Controls 152 1 (0.6) 13 (8.6) 138 (90.8) 15 (4.9) 289 (95.1)
   χ2 = 5.1, df = 2, P = 0.078 χ2 = 2.7, df = 1, P = 0.102