title: Knee moment at work: validation of a questionnaire based on knee moment in working life.
abstract: Classifications of occupations, such as those of the International Labor Organization, have previously been constructed with respect to the physical strain and joint moment to be expected in conjunction in a profession. To detect which occupational activities specifically induce high knee moments, we designed a questionnaire to analyze walking, knee bending, climbing of stairs and ladders, and jumping during three consecutive 15-year exposure periods in the professional lives of 920 consecutive residents [329 men with a mean age of 72 (range 47-96) and 561 women with a mean age of 77 (range 47-96)] drawn from the population records of the City of Malmö. The answers, classified into three categories with respect to knee joint moment, were compared with a classification of the occupations of all probands according to the same principles by three independent specialists in industrial hygiene. The two classifications showed a high degree of agreement, with Cramer's V ranging from 0.49 to 0.6, suggesting a co-variance with a common variable, i.e. the true work-related knee moment.
authors.affiliation: Department of Orthopaedics, Malmö University Hospital, Sweden.
authors.forename: A
authors.initials: A
authors.lastname: Sahlström
authors.forename: F
authors.initials: F
authors.lastname: Montgomery
authors.forename: I
authors.initials: I
authors.lastname: Balogh
mesh_terms: D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D012090:Cumulative Trauma Disorders; D005260:Female; D006801:Humans; D015994:Incidence; D007719:Knee Joint / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D009790:Occupations; D016059:Range of Motion, Articular; D012307:Risk Factors; D017678:Sex Distribution; D011795:Surveys and Questionnaires; D013548:Sweden