Association between obesity and magnetic resonance imaging defined patellar tendinopathy in community-based adults: a cross-sectional study

BMC Musculoskeletal Disorders

Yuanyuan Wang²  Richard O’Sullivan⁴  Jill Cook¹  Graham G Giles³  Anita E Wluka²  Flavia M Cicuttini²  Jason Toppi²  Jessica Fairley² 

[1] Department of Physiotherapy, School of Primary Health Care, Faculty of Medicine, Nursing and Health Sciences, Monash University, Frankston VIC 3199, Australia;School of Public Health and Preventive Medicine, Monash University, Alfred Hospital, Melbourne VIC 3004, Australia;Cancer Epidemiology Centre, Cancer Council Victoria, Carlton VIC 3053, Australia;Department of Medicine, Central Clinical School, Monash University, Melbourne, Australia

关键词: Magnetic resonance imaging;    Fat mass;    Weight;    Body mass index;    Patellar tendinopathy;    Obesity;   

Others  :  1122245
DOI  :  10.1186/1471-2474-15-266

 received in 2013-11-06, accepted in 2014-07-25,  发布年份 2014

【 摘 要 】

Background

Patellar tendinopathy is a common cause of activity-related anterior knee pain. Evidence is conflicting as to whether obesity is a risk factor for this condition. The aim of this study was to determine the relationship between obesity and prevalence of magnetic resonance imaging (MRI) defined patellar tendinopathy in community-based adults.

Methods

297 participants aged 50–79 years with no history of knee pain or injury were recruited from an existing community-based cohort. Measures of obesity included measured weight and body mass index (BMI), self-reported weight at age of 18–21 years and heaviest lifetime weight. Fat-free mass and fat mass were measured using bioelectrical impedance. Participants underwent MRI of the dominant knee. Patellar tendinopathy was defined on both T1- and T2-weighted images.

Results

The prevalence of MRI defined patellar tendinopathy was 28.3%. Current weight (OR per kg = 1.04, 95% CI 1.01-1.06, P = 0.002), BMI (OR per kg/m² = 1.10, 95% CI 1.04-1.17, P = 0.002), heaviest lifetime weight (OR per kg = 1.03, 95% CI 1.01-1.05, P = 0.007) and weight at age of 18–21 years (OR per kg = 1.03, 95% CI 1.00-1.07, P = 0.05) were all positively associated with the prevalence of patellar tendinopathy. Neither fat mass nor fat-free mass was associated with patellar tendinopathy.

Conclusion

MRI defined patellar tendinopathy is common in community-based adults and is associated with current and past history of obesity assessed by BMI or body weight, but not fat mass. The findings suggest a mechanical pathogenesis of patellar tendinopathy and patellar tendinopathy may be one mechanism for obesity related anterior knee pain.

【 授权许可】

   
2014 Fairley et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

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