Table 1.

Outcome domains and definitions included in the Standard Set^a

Category and outcome domain	Outcome definition	Agreementb
Patient‐reported health status
Hip and/or knee function	Tracked via HOOS‐PS or KOOS‐PS	100
Pain in hips, knees, or lower back	Tracked via numeric or visual analog rating scales	88
Quality of life	Tracked via EQ‐5D‐3L, SF‐12, or VR‐12	100
Work status	What is your work status? Unable to work due to a condition other than osteoarthritis; unable to work due to osteoarthritis; not working by choice (student, retired, homemaker); seeking employment (I consider myself able to work but cannot find a job); working part‐time; working full‐time	77
Satisfaction with results	How satisfied are you with the results of your treatment? Very satisfied; satisfied; neither satisfied nor dissatisfied; unsatisfied; very unsatisfied	88
Surgical outcomes
Death	All‐cause 30‐day mortality	100
Admissions	All‐cause 30‐day readmissions	88
Reoperation	Any consecutive open surgery performed on the hip or knee. Includes both minor and major reoperations. Minor revision: any reoperation with removal, exchange, and/or addition of minor implant part (e.g., head, liner). Major revision: any reoperation with removal, exchange, and/or addition of major implant part (e.g., cup, femoral component, tibial component)	94
Disease progression
Treatment progression	Which of the following treatments have you undergone in the past year for your osteoarthritis related hip or knee problems? (Tick all that apply) Information/ advice (ex: patient education, advice on diet, exercise, or other lifestyle alterations); self‐managed care (ex: nonprescription oral pain medication, medications applied to the skin, exercise, or diet program); nonsurgical, clinical care (ex: nonsteroidal antiinflammatory drugs or other prescription drugs, supervised physical or occupational therapy, orthosis or other ambulatory aids, injections directly into the joint); surgery (ex: osteotomy, resurfacing, partial or total joint replacement)	82
Care utilization	In the past year, which of the following health care providers have you seen for treatment of your osteoarthritis‐related hip or knee problems? (Tick all that apply) Health educator/peer support group, dietician, physical therapist, or general practitioner; rheumatologist; orthopedic surgeon; alternative health practitioner	82

^aHOOS‐PS = Hip Disability and Osteoarthritis Outcome Score short version; KOOS‐PS = Knee Injury and Osteoarthritis Outcome Score short version; EQ‐5D‐3L = EuroQol 5‐domain instrument with 3 levels; SF‐12 = Short Form 12 health survey; VR‐12 = Veterans Short Form 12 health survey; ex = example.

^bPercentage agreement among survey respondents.