Association of rs7775228 and rs10947262 with knee osteoarthritis.

Odds ratios (ORs) and P values for the independence test were calculated by the Mantel-Haenszel method.
aOR of the risk allele from the two-by-two allele frequency table.
bP values of the Pearson's χ2 test for the allele model.
cResults of the Breslow-Day test.
dMeta-analysis of Japanese studies.
eMeta-analysis of European studies.
fMeta-analysis of all studies.