National Center for Biotechnology Information NCBI NLM MEDLINE humans pubmed abstract nih national institutes of health national library of medicine treatment outcome research support non-u.s. gov't female male aged middle aged Drug Administration Schedule Prospective Studies Multicenter Study follow-up studies time factors multivariate analysis odds ratio confidence intervals risk assessment anti-bacterial agents / therapeutic use* probability antibiotic prophylaxis / methods* surgical wound infection / prevention & control* pmid:17342642 doi:10.1086/512192 marjo e e van kasteren judith manniën inge c gyssens arthroplasty replacement hip / adverse effects hip / methods* postoperative care / methods preoperative care / methods