Table 2.

NICE OA diagnostic criteria [19] (as used in this study).

NICE hip OA diagnostic criteria:	NICE knee OA diagnostic criteria:
•45 years of age or older •Activity-related hip pain • Do not have any signs of other (non-OA) explanations for the hip pain: o Acute hip injury in the last 6 months o Stiffness in the morning that takes longer than 30 ​min to ease o Hip is rapidly deteriorating	•45 years of age or older •Activity-related knee pain • Do not have any signs of other (non-OA) explanations for the knee pain: o Acute knee injury in the last 6 months o Stiffness in the morning that takes longer than 30 ​min to ease o Knee is hot and swollen or rapidly deteriorating

NICE, United Kingdom National Institute for Health and Care Excellence; OA, osteoarthritis.