Relationship between scores from the Knee Outcome Survey and a single assessment numerical rating in patients with patellofemoral pain.
OBJECTIVE
To determine the relationship between patient-reported single numeric ratings and actual scores obtained from a validated instrument, the Knee Outcome Survey (KOS).


BACKGROUND
Patient-reported outcome (PRO) measures are an important component of patient management. Information obtained from PRO measures can be used to prioritize goal setting, assist with clinical decision-making, provide evidence for effectiveness of interventions, monitor progress, and assess organizational or clinician performance.


METHODS
Scores from the KOS activity of daily living (ADL) and Sports subscales completed at the time of initial examination of patients with patellofemoral pain (n = 29) were retrospectively analyzed and compared to a single assessment numerical rating.


RESULTS
Bi-variate Pearson product correlation was used to determine association between the KOS-ADL and KOS-Sports with respective single assessment numerical ratings. A high correlation was observed between the KOS-ADL (0.85, p < 0.01) and KOS-Sports (0.88, p < 0.01) with a single assessment numerical rating.


CONCLUSIONS
Administration and scoring of standardized outcome measures such as the KOS-ADL and KOS-Sports require several minutes to administer but correlate well with a single assessment numerical ratings. The high correlation of single assessment numerical scores to actual KOS-ADL and KOS-Sports scores may provide support for discretionary use of single numerical ratings during interim patient care visits and/or in instances when time is limited. Additional studies are needed with larger patient populations and specific diagnostic subgroups to determine additional clinical relevance.
Bellarmine University, Louisville, Kentucky 40204, USA.
Marti
M
Bradbury
Joseph A
JA
Brosky
Jerry F
JF
Walker
Kathryn
K
West
D000203:Activities of Daily Living; D000293:Adolescent; D000328:Adult; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D046788:Patellofemoral Pain Syndrome / Q000175:diagnosis* / Q000503:physiopathology / Q000523:psychology; D010361:Patients / Q000523:psychology*; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D011795:Surveys and Questionnaires; D055815:Young Adult