Table 3.
CDI incidence rates per the main case definition and stratified by age group, 2013–2017
| Age group (in years) | 2013 | 2014 | 2015 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Incident CDI casesa | Total person-time under risk (person-years) | Incidence rate per 100,000 person-years (95% CI) |
Incident CDI casesa | Total person-time under risk (person-years) | Incidence rate per 100,000 person-years (95% CI) |
Incident CDI casesa | Total person-time under risk (person-years) | Incidence rate per 100,000 person-years (95% CI) |
|
| Overall (18–≥ 85) | 4509 | 3,191,483 | 141 (137–145) | 4367 | 3,204,953 | 136 (132–140) | 4554 | 3,223,472 | 141 (137–145) |
| 18–< 50 | 218 | 1,551,073 | 14 (12–16) | 247 | 1,532,992 | 16 (14–18) | 240 | 1,523,331 | 16 (14–18) |
| 50–59 | 263 | 594,016 | 44 (39–50) | 283 | 607,848 | 47 (41–52) | 276 | 620,578 | 44 (39–50) |
| 60–64 | 194 | 257,312 | 75 (65–87) | 237 | 258,370 | 92 (80–104) | 265 | 257,455 | 103 (91–116) |
| 65–69 | 300 | 195,584 | 153 (137–172) | 270 | 200,369 | 135 (119–152) | 315 | 211,072 | 149 (133–167) |
| 70–74 | 565 | 228,137 | 248 (228–269) | 595 | 221,885 | 268 (247–291) | 537 | 208,336 | 258 (236–281) |
| 75–79 | 827 | 175,260 | 472 (440–505) | 838 | 188,043 | 446 (416–477) | 907 | 197,510 | 459 (430–490) |
| 80–84 | 996 | 107,716 | 925 (868–984) | 860 | 108,290 | 794 (742–849) | 897 | 114,312 |
785 (734–838) |
| ≥ 85 | 1146 | 82,386 | 1391 (1312–1474) | 1037 | 87,156 | 1190 (1118–1264) | 1117 | 90,877 | 1229 (1158–1303) |
| ≥ 65 | 3834 | 789,083 |
486 (471–502) |
3600 | 805,743 | 447 (432–462) | 3773 | 822,107 | 459 (444–474) |
| ≥ 70 | 3534 | 593,499 | 595 (576–615) | 3330 | 605,374 | 550 (532–569) | 3458 | 611,035 | 566 (547–585) |
| ≥ 75 | 2969 | 365,362 | 813 (784–842) | 2735 | 383,489 | 713 (687–740) | 2921 | 402,699 | 725 (699–725) |
| Age group (in years) | 2016 | 2017 | ||||
|---|---|---|---|---|---|---|
| Incident CDI casesa | Total person-time under risk (person-years) | Incidence rate per 100,000 person-years (95% CI) |
Incident CDI casesa | Total person-time under risk (person-years) | Incidence rate per 100,000 person-years (95% CI) |
|
| Overall (18–≥ 85) | 3994 | 3,236,293 | 123 (120–127) | 3859 | 3,225,207 | 120 (116–123) |
| 18–< 50 | 220 | 1,512,427 | 15 (13–17) | 197 | 1,482,479 | 13 (11–15) |
| 50–59 | 270 | 627,505 | 43 (38–48) | 286 | 634,073 | 45 (40–51) |
| 60–64 | 217 | 257,413 | 84 (73–96) | 206 | 257,653 | 80 (69–92) |
| 65–69 | 319 | 230,648 | 138 (124–154) | 297 | 238,878 | 124 (111–139) |
| 70–74 | 456 | 189,059 | 241 (220–264) | 392 | 180,287 | 217 (196–240) |
| 75–79 | 740 | 202,284 | 366 (340–393) | 704 | 204,794 | 344 (319–370) |
| 80–84 | 806 | 121,297 | 664 (619–712) | 805 | 129,322 | 622 (580–667) |
| ≥ 85 | 966 | 95,660 | 1010 (947–1076) | 972 | 97,722 | 995 (933–1059) |
| ≥ 65 | 3287 | 838,947 | 392 (379–405) | 3170 | 851,002 | 373 (360–386) |
| ≥ 70 | 2968 | 608,299 | 488 (471–506) | 2873 | 612,125 | 469 (452–487) |
| ≥ 75 | 2512 | 419,240 | 599 (576–623) | 2481 | 431,838 | 575 (552–598) |
CDI Clostridioides difficile infection, CI confidence interval
aIncident CDI cases are defined by no previous occurrence matching the case definition within 60 days prior to the CDI occurrence