Ann Rheum Dis 53:90–93CrossRef d’Errico A, Gore R, Gold JE et al (2007) Medium- and long-term reproducibility of self-reported exposure to physical ergonomics factors at work. Appl Ergon 38:167–175.
doi:10.1016/j.apergo.2006.03.002 CrossRef Descatha A, Roquelaure Y, Caroly S et al (2009) Self-administered questionnaire and direct observation by checklist: comparing two methods for physical exposure surveillance in a highly repetitive LY2874455 cell line tasks plant. Appl Ergon 40:194–198. doi:10.1016/j.apergo.2008.04.001 CrossRef Ditchen D, Ellegast R, Rehme G (2010) GonKatast—ein Messwertkataster zu beruflichen Kniebelastungen [GonKatast—a measured value register of occupational knee stress]. IFA-report 1/2010. Hrsg.: Deutsche Gesetzliche Unfallversicherung (DGUV). Sankt Augustin Douwes M, de Kraker H, Blatter BM (2007) Validity of two methods to assess computer use: self report by questionnaire and computer use software. Int J Ind Ergonom 37:425–431. doi:10.1016/j.ergon.2007.01.002 CrossRef Ellegast RP, Kupfer J (2000) Portable
posture and motion measuring system for use in ergonomic field analysis. In: Landau K (ed) Ergonomic software tools in product and workplace design. Ergon, Stuttgart, pp 47–54 Felson DT, Hannan MT, Naimark A et al RAD001 cell line (1991) Occupational physical demands, knee bending, and knee osteoarthritis: results from the Framingham Study. J Rheumatol 18(10):1587–1592 Freitag S, Ellegast R, Dulon M et al (2007) Quantitative measurement of stressful trunk postures in nursing professions. Ann Occup Hyg 53(4):385–395. doi:10.1093/annhyg/mem018 CrossRef Glitsch U, Ottersbach HJ, Ellegast R et al (2007) Physical workload of flight STA-9090 solubility dmso attendants when pushing and pulling trolleys aboard aircraft. Int J Ind Ergon 37:845–854. doi:10.1016/j.ergon.2007.07.004 CrossRef Hansson GA, Balogh I, Byström JU et al (2001) Questionnaire versus direct technical measurements in assessing Farnesyltransferase postures and movements of the head, upper back, arms and hands. Scand J Work Environ Health 27(1):30–40CrossRef Heinrich J, Blatter BM, Bongers PM (2004) A comparison of methods
for the assessment of postural load and duration of computer use. Occup Environ Med 61:1027–1031. doi:10:1136/oem.2004.013219 CrossRef IJmker S, Leijssen JNM, Blatter BM et al (2008) Test-retest reliability and validity of self-reported duration of computer use at work. Scand J Work Environ Health 34(2):113–119CrossRef Jensen LK (2005) Knee-straining work activities, self-reported knee disorders and radiographically determined knee osteoarthritis. Scand J Work Environ Health 31(2):68–74 Jensen LK, Eenberg W, Mikkelsen S (2000) Validity of self-reporting and video-recording for measuring knee-straining work postures. Ergonomics 43(3):310–316CrossRef Klussmann A, Gebhardt H, Nuebling M et al (2010a) Individual and occupational risk factors for knee osteoarthritis: results of a case control study in Germany. Arthritis Res Ther 12:R88. doi:10.