Table 1.
Demographic variables in the analyzed data set.
| Category | Unvaccinated (N = 561) | Vaccinated (N = 2763) | χ2 | p |
|---|---|---|---|---|
| Male (N,%) | 279 (49.7%) | 1432 (51.8%) | 0.819 | 0.365 |
| Female (N,%) | 282 (50.3%) | 1331 (48.2%) | ||
| Breastfed (N,%) | 550 (98%) | 2670 (96.6%) | 3.037 | 0.081 |
| T-test | ||||
| FHA (any) | 174 (31%) | 695 (25.16%) | 28.239 | <0.00001 |
| Mean DOC | 741 | 1525 | 17.69 | <0.00001 |
| DOC matched | 741 | 741 (N = 561) | 0 | 1.0 |
| Mean BW (kg) unmatched | 3.3 | 3.28 | 0.509 | 0.305 |
DOC = “Days of Care” = (day of age at last record − day of age at first record); FHA = family history of autoimmunity (at least one condition); Mean BW = average body weight (day 1). The “T-test” is in bold in the table because it is a column subheader.