Table 2.
Crude and Propensity Score–Adjusted Difference in Costs Between Methicillin-resistant Staphylococcus aureus- and Methicillin-susceptible Staphylococcus aureus-Related Hospitalizations, 2014
| Crude costs, $a | Propensity score–adjusted costs, $a | ||||
|---|---|---|---|---|---|
| MRSA | MSSA | MRSA | MSSA | P Value | |
| Overall (n = 616070) | |||||
| Septicemiaa | 35408 (34007–36808) | 34628 (33154–36102) | 34526 (32918–36134) | 34175 (32347–36002) | .69 |
| Pneumoniab | 39589 (38048–41131) | 54132 (51632–56632) | 38561 (36811–40725) | 40725 (38717–42733) | .045 |
| Unspecifiedc | 15948 (15516–16380) | 18977 (18262–19692) | 14792 (14383–15201) | 15578 (15079–16077) | <.001 |
| Hospitalizations with no in-hospital mortality (n = 587850) | |||||
| Septicemiaa | 33564 (32224–34904) | 32440 (31157–33723) | 32618 (31072–34164) | 32170 (30585–33754) | .589 |
| Pneumoniab | 37737 (36162–39311) | 52678 (50060–55296) | 36771 (34989–38553) | 39041 (37015–41066) | .047 |
| Unspecifiedc | 15637 (15218–16057) | 18545 (17879–19212) | 14529 (14132–14926) | 15314 (14828–15799) | <.001 |
| Hospitalizations with no in-hospital mortality (LOS < 10 days) (n = 407040) | |||||
| Septicemiaa | 13269 (12999–13538) | 14130 (13845–14416) | 13204 (12930–13479) | 13886 (13594–14177) | <.001 |
| Pneumoniab | 12962 (12661–13264) | 15483 (14871–16096) | 12870 (12565–13175) | 13763 (13266–14259) | .001 |
| Unspecifiedc | 9131 (9009–9252) | 10248 (10088–10408) | 9106 (8981–9230) | 9576 (9432–9720) | <.001 |
Abbreviations: LOS, length of stay; MRSA, methicillin-resistant Staphylococcus aureus; MSSA, methicillin-susceptible Staphylococcus aureus.
aMean total cost (95% confidence interval).
b International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9) codes 038.11 and 038.12.
cICD-9 codes 482.41 and 482.42.
dICD-9 codes 041.11 and 041.12.