Table 2:
Mean Annual Counts and Rates of All-cause Acute Gastroenteritis (AGE) and Estimated Norovirus (NV)* by Outcome and Age Group—United States, Seasonal Years 2001/2002 – 2014/2015
| All-Cause AGE | Estimated* NV | ||||
|---|---|---|---|---|---|
| Counts in 10K† | Rate per 10K PY‡ | Counts in 10K† (95% CI) | Rate per 10K PY‡ (95% CI) | % of All-Cause AGE | |
| Ambulatory Clinic Encounters | |||||
| <5 years | 240.9 | 1209.3 | 56.1 (44.0 – 71.0) | 281.4 (221.0 – 356.2) | 23.3 |
| 5 – 17 years | 166.3 | 309.6 | 53.3 (41.8 – 66.4) | 99.2 (77.9 – 123.6) | 32.0 |
| 18 – 64 years | 756.1 | 397.4 | 75.6 (58.2 – 95.5) | 39.7 (30.6 – 50.2) | 10.0 |
| 65 – 74 years | 119.4 | 561.1 | 16.0 (11.7 – 21.3) | 75.2 (55.0 – 100.0) | 13.4 |
| 75 – 84 years | 112.4 | 855.5 | 18.5 (13.2 – 24.6) | 140.8 (100.2 – 187.6) | 16.5 |
| 85+ years | 61.2 | 1172.2 | 7.9 (5.6 – 10.6) | 151.3 (107.3 – 202.5) | 12.9 |
| All ages | 1456.4 | 479.8 | 227.3 (174.5 – 289.4) | 74.9 (57.5 – 95.3) | 15.6 |
| ED Visits | |||||
| <5 years | 30.3 | 151.9 | 9.2 (7.2 – 11.8) | 46.2 (36.1 – 59.4) | 30.4 |
| 5 – 17 years | 24.5 | 45.6 | 7.4 (5.5 – 9.7) | 13.8 (10.2 – 18.0) | 30.1 |
| 18 – 64 years | 124.8 | 65.6 | 24.0 (17.8 – 31.6) | 12.6 (9.4 – 16.6) | 19.2 |
| 65 – 74 years | 14.0 | 65.9 | 2.2 (1.6 – 3.0) | 10.5 (7.6 – 13.9) | 16.0 |
| 75 – 84 years | 14.2 | 108.4 | 2.1 (1.4 – 2.8) | 15.7 (11.0 – 21.4) | 14.5 |
| 85+ years | 8.8 | 167.5 | 1.7 (1.2 – 2.1) | 31.7 (23.6 – 41.0) | 18.9 |
| All ages | 216.6 | 71.4 | 46.5 (34.8 – 61.0) | 15.3 (11.5 – 20.1) | 21.5 |
| Hospitalizations | |||||
| <5 years | 9.9 | 49.6 | 2.5 (2.0 – 3.2) | 12.5 (10.0 – 15.9) | 25.3 |
| 5 – 17 years | 4.5 | 8.4 | 0.7 (0.5 – 1.0) | 1.3 (0.9 – 1.8) | 15.8 |
| 18 – 64 years | 51.2 | 26.9 | 3.1 (2.1 – 4.2) | 1.6 (1.1 – 2.2) | 6.0 |
| 65 – 74 years | 20.0 | 94.1 | 1.4 (1.0 – 1.8) | 6.5 (4.6 – 8.6) | 6.9 |
| 75 – 84 years | 22.7 | 172.9 | 1.8 (1.3 – 2.4) | 13.7 (9.7 – 18.2) | 7.9 |
| 85+ years | 14.1 | 270.2 | 1.5 (1.1 – 2.0) | 28.5 (20.9 – 37.5) | 10.6 |
| All ages | 122.4 | 40.3 | 10.9 (8.0 – 14.5) | 3.6 (2.6 – 4.8) | 8.9 |
| Mortality†‡ | |||||
| <5 years | 472 | 23.7 | 36 (28 – 44) | 1.8 (1.4 – 2.2) | 7.6 |
| 5 – 64 years | 2031 | 8.3 | 85 (68 – 104) | 0.3 (0.3 – 0.4) | 4.2 |
| 65+ years | 13476 | 339.9 | 744 (560 – 959) | 18.8 (14.1 – 24.2) | 5.5 |
| All ages | 15979 | 52.6 | 865 (656 – 1107) | 2.8 (2.2 – 3.6) | 5.4 |
*
Defined as model-estimated plus coded norovirus.
†
For mortality, total actual AGE and estimated norovirus counts presented.
‡
For mortality, rates per million PY. Abbreviations: AGE – Acute Gastroenteritis; CI – confidence interval; NV – Norovirus; K – thousands; PY – Person-Years.