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Table 4 Rates of major in-hospital complications by HMD-recorded obesity and body mass index based on actual weight and height of patients by Charlson Co-morbidity Index categories

From: Use of routine hospital morbidity data together with weight and height of patients to predict in-hospital complications following total joint replacement

Charlson Co-morbidity Index categories Diagnosis of obesity as recorded in HMD1 Body mass index calculated from weight and height measured by nurses from HIMS survey2
No obesity diagnosis N=793 With obesity diagnosis N=64 BMI 18.5-24.9 N=153 BMI 25-29.9 N=488 BMI > 30 N=216
0 n=384 14% 33% 17% 13% 17%
1-2 n=323 23% 32% 10% 28%! 25%!
> 3 n=150 25% 33% 6% 33%! 31%!
All n=857 19% 34%! 12% 22%! 23%!
  1. ! 0.001<p<0.05.
  2. 1 Patients with an obesity diagnosis in HMD were compared with those who had no such diagnosis in HMD.
  3. 2 Patients with BMI 25-29.9 or BMI > 30 were compared with those with BMI 18.5-24.9.
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