Purpose: Surgical site infection (SSI) increases medical costs and prolongs hospitalization; however, there has been no multicenter study examining the socioeconomic effects of SSI after cardiovascular surgery in Japan.
Methods: A retrospective 1:1 matched, case-controlled study on hospital stay and health care expenditure after cardiovascular surgery was performed in four hospitals. Patients selected for the study had undergone coronary artery bypass grafting and/or valve surgery between April, 2006 and March, 2008. Data were obtained for 30 pairs of patients.
Results: The mean postoperative stay for the SSI group was 49.1 days, being 3.7 times longer than that for the non-SSI group. The mean postoperative health care expenditure for the SSI group was ¥ 2,763,000 (US$27,630), being five times higher than that for the non-SSI group. Charges for drug infusion and hospitalization for inpatient care were significantly higher for the SSI group than for the non-SSI group. The increased health care expenditure was mainly attributed to the cost of antibiotics and antimicrobial agents.
Conclusion: SSI after cardiovascular surgery not only prolonged the length of hospital stay, but also increased medical expenditure. Thus, the prevention of SSI after cardiovascular surgery is of great socioeconomic importance.
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