SSI-attributable costs before and during intervention (2018 PPP-adjusted US$)
| Before intervention US$ (95% CI) | During intervention US$ (95% CI) | Difference US$ (% change) | P values* | |
| Patient direct medical costs | ||||
| Mean cost of systemic antibiotics | 419.66 (398 to 458) | 456.82 (408 to 464) | 37.16 (8.9) | 0.219 |
| Mean cost of wound dressing | 74.82 (68 to 82) | 58.58 (46 to 62) | −16.24 (21.7) | 0.332 |
| Mean cost of laboratory tests | 117.16 (111 to 125) | 51.93 (46 to 54) | −65.23 (55.7) | <0.05 |
| Mean cost of consultation | 634.38 (593 to 677) | 574.24 (490 to 589) | −60.14 (9.5) | <0.05 |
| Patient indirect medical cost† | ||||
| Mean non-medical cost | 380.63 (355 to 398) | 291.64 (260 to 316) | −88.99 (23.4) | <0.01 |
| Patient indirect costs | ||||
| Mean cost of productivity loss | 581.60 (355 to 831) | 509.02 (309 to 660) | −72.60 (12.5) | 0.110 |
| Mean patient cost per patient with SSI | 2208.25 (2087 to 2376) | 1942.23 (1758 to 2227) | −266.02 (12.1) | |
| Hospital cost attributable to SSI | 1391 | 1047 | −344 (24.7) | |
| Total | 3599.25 | 2989.23 | −610 (16.9) |
*P values comparing significant differences in SSI-attributable cost before and during intervention.
†Includes cost of transportation, accommodation and feeding.
PPP, Purchasing Power Parity; SSI, surgical site infection.