At the end of the four years, all unit managers in the pilot hospitals reported improvement in all TCAB domains and attributed all or some of these improvements to TCAB. Reporting of outcome measures was uneven, and many units demonstrated no improvements on the measures tracked. However, between 2005 and 2007, falls with harm declined, on average, 45 percent, and the calling of “code blue” (meaning need to resuscitate) for cardiac arrest declined 30 percent. Thirty-day readmissions declined 25 percent between 2006 and 2007.23 Preliminary results of a business-case analysis commissioned by the RWJF, using a limited set of outcomes (costs of avoided falls and low levels of turnover and overtime), suggest that the cost savings might have exceeded the costs of implementation.