Table 1.
Tetanus-Diphtheria-Pertussis Vaccination of Infant Close Contacts ≥ 18 Years of Age
| Contact | Received Tdap, No. (%) | P Value | Time Since Tdap Receipt, d, Median (Range) | P Value | ||
|---|---|---|---|---|---|---|
|
|
|
|||||
| Case CCs (n = 107) | Control CCs (n = 264) | Case CCs (n = 107) | Control CCs (n = 264) | |||
| Mother | 19/42 (45.2) | 55/126 (43.7) | .91 | 43.5 (14–741) | 52 (15–1674) | .66 |
|
| ||||||
| Father | 4/26 (15.4) | 11/68 (16.2) | .71 | 802 (86–1678) | 109 (28–1895) | .26 |
|
| ||||||
| Grandparent | 6/20 (30.0) | 12/48 (25.0) | .32 | 518.5 (35–1026) | 174 (15–1447) | .70 |
|
| ||||||
| Aunt/Uncle | 3/12 (25.0) | 3/15 (20.0) | .15 | 696.5 (60–1333) | 278 (109–2135) | .89 |
|
| ||||||
| Othera | 3/7 (42.9) | 3/7 (42.9) | ... | 1267 (1116–1473) | 58 (20–2009) | .46 |
|
| ||||||
| Overall | 35 (32.7) | 84 (31.8) | .89 | 86 (14–1845) | 75.5 (15–2135) | .27 |
Abbreviations: CC, close contact; Tdap, tetanus toxoid, reduced diphtheria toxoid, and acellular pertussis vaccine.
a
Other includes adult siblings, cousins, and other close contacts.