Table 1.
Variable | Not Vaccinated (n = 64 099), No. | Full Vaccination (n = 186 502), No. | P Value |
---|---|---|---|
Age | |||
| |||
6–11 wk | 0 | 4 (<1%) | <.001a |
12–19 wk | 1018 (2%) | 1651 (1%) | |
20–34 wk | 5839 (9%) | 3434 (2%) | |
35–48 wk | 57 242 (89%) | 181 413 (97%) | |
| |||
Sex | |||
| |||
Female | 30 958 (48%) | 91 241 (49%) | .006a |
Male | 33 141 (52%) | 95 261 (51%) | |
| |||
Seizure | |||
| |||
Yes | 669 (1%) | 1575 (1%) | <.001a |
No | 63 429 (99%) | 184 920 (99%) | |
| |||
Seasonality of seizure event | |||
| |||
January–June | 369 (55%) | 774 (49%) | .010a |
July–December | 300 (45%) | 801 (51%) | |
| |||
Days since vaccination that seizure occurredb | |||
| |||
29–88 d | 99 (15%) | 249 (16%) | .581 |
89–148 d | 114 (17%) | 246 (16%) | |
149–208 d | 114 (17%) | 297 (19%) | |
209–268 d | 140 (21%) | 345 (22%) | |
269–328 d | 139 (21%) | 285 (18%) | |
329–388 d | 63 (9%) | 153 (10%) |
For unvaccinated children, an index date was randomly selected by a computer program to fall within the age recommended by the Advisory Committee on Immunization Practices for receiving rotavirus vaccination.
Statistically significant.
The date of last rotavirus vaccination serves as the index date for those vaccinated.