Clinical knee findings in floor layers with focus on meniscal status

Department of Orthopaedics, Regional Hospital Viborg, Denmark.
BMC Musculoskeletal Disorders (Impact Factor: 1.72). 11/2008; 9(1):144. DOI: 10.1186/1471-2474-9-144
Source: PubMed


The aim of this study was to examine the prevalence of self-reported and clinical knee morbidity among floor layers compared to a group of graphic designers, with special attention to meniscal status.
We obtained information about knee complaints by questionnaire and conducted a bilateral clinical and radiographic knee examination in 134 male floor layers and 120 male graphic designers. After the exclusion of subjects with reports of earlier knee injuries the odds ratio (OR) with 95% confidence intervals (CI) of knee complaints and clinical findings were computed among floor layers compared to graphic designers, using logistic regression. Estimates were adjusted for effects of body mass index, age and knee straining sports. Using radiographic evaluations, we conducted side-specific sensitivity analyses regarding clinical signs of meniscal lesions after the exclusion of participants with tibiofemoral (TF) osteoarthritis (OA).
Reports of knee pain (OR = 2.7, 95% CI = 1.5-4.6), pain during stair walking (OR = 2.2, 95% CI = 1.3-3.9) and symptoms of catching of the knee joint (OR = 2.9, 95% CI = 1.4-5.7) were more prevalent among floor layers compared to graphic designers. Additionally, significant more floor layers than graphic designers had clinical signs suggesting possible meniscal lesions: a positive McMurray test (OR = 2.4, 95% CI = 1.1-5.0) and TF joint line tenderness (OR = 5.4, 95% CI = 2.4-12.0). Excluding floor layers (n = 22) and graphic designers (n = 15) with radiographic TF OA did not alter this trend between the two study groups: a positive McMurray test (OR = 2.2, 95% CI = 1.0-4.9), TF joint line tenderness (OR = 5.0, 95% CI = 2.0-12.5).
Results indicate that floor layers have a high prevalence of both self-reported and clinical knee morbidity. Clinical knee findings suggesting possible meniscal lesions were significant more prevalent among floor layers compared to a group of low-level exposed graphic designers and an association with occupational kneeling could be possible. However, causality cannot be confirmed due to the cross-sectional study design.

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Available from: Lilli Kirkeskov, Dec 09, 2014
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    • "Thun et al. (1987) concluded that " workers who kneel to perform their jobs inflict chronic trauma to their knee joints. " Carpet layers are at an increased risk for a variety of knee disorders, including cartilage damage due to frequent and prolonged kneeling and squatting in addition to the use of a knee kicker to stretch carpet (NIOSH, 1990; Habes et al., 1994; Thun et al., 1987; Rytter et al., 2008; Holmstrom et al., 1995). The risk for development of knee osteoarthritis is also increased in occupations requiring kneeling, squatting , climbing, and heavy physical workloads (Manninen et al., 2002; Schneider, 2001). "
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