title: Why does osteoarthritis of the knee hurt--sometimes?
authors.forename: P
authors.initials: P
authors.lastname: Creamer
authors.forename: M C
authors.initials: MC
authors.lastname: Hochberg
mesh_terms: D000368:Aged; D005260:Female; D006306:Health Surveys; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000503:physiopathology*; D008297:Male; D010003:Osteoarthritis / Q000150:complications* / Q000503:physiopathology / Q000523:psychology; D010146:Pain / Q000453:epidemiology* / Q000209:etiology* / Q000503:physiopathology; D015995:Prevalence; D011859:Radiography; D012307:Risk Factors; D012720:Severity of Illness Index; D006113:United Kingdom / Q000453:epidemiology; D014481:United States / Q000453:epidemiology