title: A comparison of patient-reported and measured range of motion in a cohort of total knee arthroplasty patients.
abstract: Range of motion (ROM) is an important component of the assessment of total knee arthroplasty (TKA) outcome. We compared patient-reported versus clinically observed ROM in a prospective cohort. Clinically observed ROM was measured using a goniometer by a trained research assistant. Self-reported ROM was estimated using a set of lateral knee photographs depicting varying levels of flexion and extension. All measures were taken pre-operatively, three, and six months postoperatively. We found statistically significant associations between self-reported ROM and clinically observed ROM for flexion and extension (all P < 0.001). We dichotomized flexion at 90° and found that self-report had a specificity of 94% and sensitivity of 65%. We conclude that patient-reported ROM may be a useful outcome measure for TKA.
authors.affiliation: Brigham and Women's Hospital, Boston, Massachusetts; Boston University School of Public Health, Boston, Massachusetts.
authors.forename: Jamie E
authors.initials: JE
authors.lastname: Collins
authors.affiliation: Brigham and Women's Hospital, Boston, Massachusetts.
authors.forename: Benjamin N
authors.initials: BN
authors.lastname: Rome
authors.affiliation: Brigham and Women's Hospital, Boston, Massachusetts.
authors.forename: Meghan E
authors.initials: ME
authors.lastname: Daigle
authors.affiliation: Brigham and Women's Hospital, Boston, Massachusetts.
authors.forename: Vladislav
authors.initials: V
authors.lastname: Lerner
authors.affiliation: Brigham and Women's Hospital, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts.
authors.forename: Jeffrey N
authors.initials: JN
authors.lastname: Katz
authors.affiliation: Brigham and Women's Hospital, Boston, Massachusetts; Boston University School of Public Health, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts.
authors.forename: Elena
authors.initials: E
authors.lastname: Losina
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000601:surgery; D008297:Male; D008875:Middle Aged; D009985:Orthopedics / Q000379:methods; D020370:Osteoarthritis, Knee / Q000503:physiopathology*; D017063:Outcome Assessment, Health Care; D011446:Prospective Studies; D016059:Range of Motion, Articular; D057566:Self Report; D012680:Sensitivity and Specificity; D013997:Time Factors; D016896:Treatment Outcome
keywords: knee osteoarthritis; range of motion; rehabilitation; self-reported outcomes; total knee arthroplasty