Association of occupational activity with joint space narrowing and osteophytosis in the medial compartment of the knee: the ROAD study (OAC5914R2) S.

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Association of occupational activity with joint space narrowing and osteophytosis in the medial compartment of the knee: the ROAD study (OAC5914R2) S. Muraki, H. Oka, T. Akune, Y. En-yo, M. Yoshida, K. Nakamura, H. Kawaguchi, N. Yoshimura Osteoarthritis and Cartilage Volume 19, Issue 7, Pages 840-846 (July 2011) DOI: 10.1016/j.joca.2011.03.008 Copyright © 2011 Osteoarthritis Research Society International Terms and Conditions

Fig. 1 Schema of image processing by KOACAD (cited from reference number9). (A). Outlines of anterior and posterior margins of the tibial plateau. The middle line between the two outlines is defined as the lower rim of the joint space. (B). Medial and lateral mJSWs were defined as the minimum vertical distances in the joint space area. (C). OPA (red area) that is medially prominent over the smoothly extended outline of the tibia. Osteoarthritis and Cartilage 2011 19, 840-846DOI: (10.1016/j.joca.2011.03.008) Copyright © 2011 Osteoarthritis Research Society International Terms and Conditions

Fig. 2 Percentage of participants engaged in each occupational activity: sitting on a chair ≥2h/day, kneeling ≥1h/day, squatting ≥1h/day, standing ≥2h/day, walking ≥3km/day, climbing ≥1h/day, or lifting weights ≥10kg ≥1 time/week among agricultural, forestry, and fishery workers; factory and construction workers; clerical workers and technical experts; and others. Osteoarthritis and Cartilage 2011 19, 840-846DOI: (10.1016/j.joca.2011.03.008) Copyright © 2011 Osteoarthritis Research Society International Terms and Conditions