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Table 1 Number of cases and incidence rates of community-associated and hospital-acquired C. difficile infection, 2004-2007

From: Incidence of and risk factors for community-associated Clostridium difficile infection: A nested case-control study

Year Total Person-years Number of CA-CDI Cases CA-CDI Incidence Rate* Number of HA-CDI Cases HA-CDI Incidence Rate*
2004 667,113 62 9.29 85 12.71
2005 673,630 84 12.47 76 11.28
2006 666,127 74 11.11 84 12.61
2007 716,265 84 11.76 93 12.98
  1. * Incidence rates expressed as the number of cases per 100,000 person-years.