A genome-wide association study of copy-number variation identifies putative loci associated with osteoarthritis in Koreans

Table 2 Number of cases and controls in each OA type

Study	Classification system	Cut-off value for OA	Exact OA definition	Knee OA		Wrist OA
Study	Classification system	Cut-off value for OA	Exact OA definition	Cases	Controls	Cases	Controls
KARE^a	K/L score	2	One definite osteophyte (original K ≥2)	167	467	204	467

ISSN: 1471-2474