Table 2.

Age and breed of horses with healthy joints and those with acute (<4 weeks) or chronic (>4 months) lameness or joints with structural osteoarthritis (OA) lesions

	Healthy control	Acute lameness	Chronic lameness	OA
n	15	9	8	7
Mean age (years)	3.9	9.8	13.1	7.6
Age range (years)	1–12	4–20	4–18	3–19
Standardbred	14	1		7
Swedish Warmblood horse	1	5	4
Pony		3	4
Biobank I [ref 14]	7	1
Biobank II [ref 13]	8			7
Biobank III		8	8