Relationships between body mass indices and surgical replacements of knee and hip joints.
Wendelboe-AM; Hegmann-KT; Biggs-JJ; Cox-CM; Portmann-AJ; Gildea-JH; Gren-LH; Lyon-JL
Am J Epidemiol 2002 Jun; 155(11)(Suppl):S88
Osteoarthritis is both the most common form of arthritis and the most common reason for joint replacement surgery. Those obese are believed to be more likely to develop generalized osteoarthritis that leads, not only to knee, but also to hip joint replacement surgeries. We hypothesized that obesity is also a risk for partial joint replacements and surgical revisions. A frequency matched case-control study in Utahns. There were 840 hip and 917 knee joint replacement surgery patients, ages 55-74 from 1992-2000 included in this study. Cases were randomly matched to 5,578 controls defined as Utah residents enrolled in a cancer screening trial. Odds ratios were calculated using ICD-9 procedural codes and body mass index (HMl) groups. There was a strong association between increasing BMI and both total hip (lCD-9 81.51) and knee replacement (lCD-9 81.54) procedures. In males, the highest odds ratios were for those 37.50-39.99 kg/m2 (total hip: OR=9.37, 95% CI=2.64, 33.31; total knee: OR=16.40, 95% CI=5.19. 51.86). In females, the highest odds ratios were for those >/= 40 kg/m2 (total hip: OR=4.47, 95% CI=2.13, 9.37; total knee: OR=19.05, 95% CI=9.79, 37.08). There were slight gender-specific differences in risk found for partial hip replacement procedures. Unexpectedly, no statistically significant risk from obesity for hip or knee revision procedures was found. While there is an association between obesity and hip and knee joint replacement surgeries, obesity does not appear to confer an independent risk for hip or knee revision procedures.
Skeletal-disorders; Skeletal-system; Body-regions; Body-weight; Surgery; Knee-injuries; Weight-factors; Weight-measurement; Men; Women; Age-factors; Age-groups; Risk-factors; Epidemiology
American Journal of Epidemiology
University of Utah, Salt Lake City, Utah