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Table 5 Onset of severe knee pain at three years in adults aged 50 years and over with no knee pain or non-severe knee pain at baseline by body mass index (BMI) category.

From: Disabling knee pain – another consequence of obesity: Results from a prospective cohort study

BMI category at baseline   Severe knee pain at 3 years Unadjusted analysis Adjusted analysisa
  n n (%) Potential cases avoidedb (% of all incident cases) Potential cases avoidedb (% of all incident cases)
Normalc 1295 106 (8.2) - -
Overweight 1168 123 (10.5) 21 (6.9) 24 (7.8)
Obese 371 77 (20.8) 35 (11.4) 33 (10.8)
Total 2834 306 (10.8) 56 (18.3) 57 (18.6)
  1. a adjusted for age, gender, deprivation, anxiety, depression, previous knee injury, widespread pain, chronicity of knee pain (3 months or more) at baseline and laterality of knee pain (1 knee or both) at baseline
  2. b number of cases which could have been avoided by reducing overweight people to normal and obese people to overweight
  3. c Normal weight category includes individuals who were underweight.