Table 3. Results of studies investigating the relationship between ADAM12 (rs1871054 and rs3740199) polymorphisms and knee OA.

Study	Population	SNPs	Pathologic findings	Results in sex
Kerna et al. (2009)	Estonian population	rs3740199	PFKOA	M (+)
		rs1871054	PFKOA	F (-)
				M/F (-)
Kerna et al. (2013)*	Estonian population	rs1871054	Advance stage OA osteophyte formation	M/F (+)
Wang et al. (2015)	Chinese Han population	rs3740199	PFKOA	M/F (-)
		rs1871054
Lou et al. (2014)	Chinese Han population	rs3740199	PFKOA	M/F (-)
		rs1871054	PFKOA susceptibility	M/F (+)
Poonpet et al. (2016)	Thai population	rs3740199	PFKOA susceptibility	M (+)
				F (-)
OA: Osteoarthritis; SNPs: Single nucleotide polymorphisms; PFKOA: Patellofemoral knee osteoarthritis; M: Male; F: Female; * Study with different radiographic classification system in same population