Table 2.
Costs associated with obesity (estimates derived from multivariate linear regression models)
| Analytical sample | Cost per five-unit increase in BMI greater than 30 kg/m2 | |||
|---|---|---|---|---|
| Hospitalization costs (USD) | 95% CI | Total 90-day costs (USD) | 95% CI | |
| All patients undergoing primary and revision THA | ||||
| Adjusted for age, sex, surgery type, surgical indication | $744 | $499–$989 | $1183 | $851–$1516 |
| Adjusted for age, sex, surgery type, surgical indication, comorbidities | $600 | $360–$841 | $1019 | $692–$1347 |
| Excluding patients with significant comorbidities* and adjusted for age, sex, surgery type, surgical indication | $657 | $381–$932 | $1053 | $747–$1359 |
| Excluding patients with complications, adjusted for age, sex, surgery type, surgical indication, comorbidities | $606 | $404–$807 | $953 | $682–$1224 |
| Patients undergoing primary THA † | ||||
| Adjusted for age, sex | $620 | $439–$801 | $906 | $628–$1184 |
| Adjusted for age, sex, comorbidities | $495 | $319–$670 | $845 | $575–$1115 |
| Excluding patients with significant comorbidities# and adjusted for age, sex | $550 | $353–$746 | $954 | $622–$1285 |
| Patients undergoing revision THA ‡ | ||||
| Adjusted for age, sex, surgical indication | $895 | $290–$1499 | $1547 | $744–$2350 |
| Adjusted for age, sex, surgical indication, comorbidities | $609 | $19–$1199 | $1170 | $383–$1957 |
| Excluding patients with significant comorbidities* and adjusted for age, sex, surgical indication | $892 | $421–$1362 | $1367 | $639–$1294 |
* Patients with selected comorbidities that are significantly associated with costs are excluded; †patients older than 25 years undergoing primary THA with degenerative arthritis and no recorded malignancies or metastases; ‡patients older than 25 years undergoing revision THA and no recorded malignancies or metastases.