Table 5 Comparison of the number of CDI episodes in 2009 in the Medicare data according to the extent of information used to identify CDI
Source of information from medicare files | ||||
|---|---|---|---|---|
Type of CDI | Definition of CDI | Complete inpatient + outpatient | Inpatient only (comparable to SID) | Inpatient-unlinked (comparable to NIS) |
# hospital stays | – | 488,344 | 488,344 | 522,921 |
Total Inpatient CDI episodes | – | 5,576 | 6,276 | 8,108 |
Inpatient CDI Episodes | Primary discharge diagnosis) | 1,464 | 1,690 | 2,084 |
Admission diagnosis | 487 | 584 | 824 | |
Secondary discharge diagnosis | 3,625 | 4,002 | 5,200 | |
Outpatient CDI episodes | – | 4,076 | N/A | N/A |
Total CDI episodes | – | 9,652 | 6,276 | 8,108 |
Categorization of CDI Episodes (% of episodes) | ||||
Hospital-Onset | 3,223 (33.4) | 3,765 (60.0) | 4,769 (58.8) | |
Other Healthcare Facility-Onset | 2,425 (25.1) | N/A | N/A | |
Community-Onset Healthcare Facility–associated | 1,258 (13.0) | 938 (14.9) | N/A | |
Community-associated CDI | 2,185 (22.6) | 1,032 (16.4) | 3,339 (41.2) | |
Indeterminate | 561 (5.8) | 541 (8.6) | N/A | |
Rate of CDI Episodes | ||||
Rate of CDI/100,000 person-years | 677 | 440 | 553a | |
Rate of hospital onset CDI/10,000 pt. days | 9.8 | 11.4 | 14.1 | |
Prevalence of CDI at admission/1,000 hospitalizations | 5.4 | 5.3 | 6.5 | |
Rate of healthcare facility-associated CDI/10,000 pt. days | 12.5 | 14.2 | 14.1 | |