Chlorhexidine-alcohol versus povidone iodine for surgical-site antisepsis This randomized controlled trial compared the efficacy of ChloraPrep (2% chlorhexidine gluconate/70% isopropyl alcohol) versus povidone iodine scrub and paint in preventing surgical site infections (SSIs) in 849 patients undergoing clean-contaminated surgery. Results showed ChloraPrep reduced SSIs by 41% compared to povidone iodine, with lower rates of both superficial and deep incisional infections. ChloraPrep was more protective against SSIs across all surgery types studied. The study demonstrates ChloraPrep is superior to povid