U.S. News & World Report has responded to concerns that its hospital-acquired infections (HAI) measure seems to disagree with the Centers for Medicare & Medicaid Services' public reporting that uses the same data. The publication uses the HAI measure for its Best Hospitals for Common Care ratings and appears in the ratings for hip replacement, knee replacement, heart failure, CABG and COPD. Some organizations, according to U.S. News, have questioned why, for some hospitals, the summary measurement apparently contradicts its scores in six subcategories. This disparity, according to the publication, has three possible causes: lesser statistical weight for certain submeasures; more generous HAI measures used by CMS; or U.S. News' formula weighting hospitals' overall measures toward HAIs is more likely to affect patients representative of their case mix. Article