Table 5.
Characteristics of the joint-specific PROMs evaluated in validation studies
| Instrument | Year developed | Original language | Target population | Intended construct/domains | No of questions | Best/worst score |
| Symptoms and functional status | ||||||
| KOOS21 | 1998 | English and Swedish | Younger and more active subjects at risk of knee osteoarthritis following knee injury | Pain Symptoms Activities of daily life function Sports and recreation function Knee-related quality of life |
42 questions | 100/0 |
| WOMAC19 | 1982 | English | Patients with OA of the hip or knee | Pain Stiffness Function and daily activities |
24 questions | 0/96 |
| Activity level | ||||||
| LEAS29 | 2005 | English | Patients awaiting or had undergone primary or revision lower limb joint replacement | Physical activity | 1 question | 18/1 |
KOOS, Knee Injury and Osteoarthritis Outcome Score; LEAS, Lower Extremity Activity Scale; PROM, patient-reported outcome measure; SF-36, Short Form 36; WOMAC, Western Ontario and McMaster Universities Arthritis Index.