title: Depressive symptoms and structural disease progression in knee osteoarthritis: data from the Osteoarthritis Initiative.
abstract: Depressive symptoms are associated with increases in pain and functional limitations in knee osteoarthritis (OA). The aim was to determine whether depressive symptoms are also associated with greater structural knee OA progression. Four years of annual radiographic and clinical assessments from the Osteoarthritis Initiative were analyzed. The Center for Epidemiological Studies Depression Scale was used to identify depressive symptoms (threshold = ≥16) at the baseline visit. Propensity scores were used to match participants with and without baseline depressive symptoms on multiple potential confounders. Assessment of radiographic knee OA was based on changes in individual radiographic features, which included osteophyte (OST) grade and joint space narrowing (JSN) grade. Mixed effect models were used to examine structural progression between depressed and non-depressed participants with definitive radiographic knee OA. Depressive symptoms were significantly associated with a higher risk of OST progression (odds ratio [OR] = 1.74; 95% confidence interval [CI]: 1.01, 3.00) and a non-significant lower risk of JSN progression (OR = 0.40; 95% CI: 0.14, 1.15) 1 year after baseline. Conversely, there was a non-significant lower risk of OST progression (OR = 0.71; 95% CI: 0.28, 1.79) and higher risk of JSN progression (OR = 1.89; 95% CI: 0.71, 5.06) from year 3 to year 4 of follow-up. However, the patterns of OST progression and JSN progression were not significantly different between the depressed and non-depressed (P = 0.25 and 0.15, respectively). The findings provide no evidence that depressive symptoms have a detectable effect on changes in radiographic disease severity in knee OA.
authors.affiliation: Department of Epidemiology and Public Health, University of Maryland School of Medicine, 660 W. Redwood Street, Howard Hall Suite 200, Baltimore, MD, 21201, USA. arathbun@epi.umaryland.edu.
authors.forename: Alan M
authors.initials: AM
authors.lastname: Rathbun
authors.affiliation: Harvard Medical School, Hebrew SeniorLife Institute for Aging Research, Boston, MA, USA.
authors.forename: Michelle S
authors.initials: MS
authors.lastname: Yau
authors.affiliation: Translational Gerontology Branch, National Institutes on Aging, Bethesda, MD, USA.
authors.forename: Michelle
authors.initials: M
authors.lastname: Shardell
authors.affiliation: Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, USA.
authors.forename: Elizabeth A
authors.initials: EA
authors.lastname: Stuart
authors.affiliation: Division of Rheumatology and Clinical Immunology, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA.
authors.forename: Marc C
authors.initials: MC
authors.lastname: Hochberg
mesh_terms: D000368:Aged; D015415:Biomarkers / Q000378:metabolism; D001842:Bone and Bones / Q000473:pathology; D002356:Cartilage / Q000473:pathology; D003863:Depression / Q000150:complications*; D018450:Disease Progression; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000150:complications* / Q000523:psychology*; D054850:Osteophyte / Q000473:pathology; D010146:Pain / Q000503:physiopathology; D010147:Pain Measurement; D011446:Prospective Studies; D012307:Risk Factors; D012720:Severity of Illness Index
chemical_list: D015415:Biomarkers
keywords: Bone; Cartilage; Epidemiology; Osteoarthritis