Table 4.
Proportion of American Indian/Alaska Native and non-Hispanic White Montana children demonstrating specific undervaccination patterns.
|
American Indian/Alaska Native n = 3,630 |
Non-Hispanic White n = 18,022 |
|||
|---|---|---|---|---|
| Pattern | n (column %) |
Average days undervaccinated Mean ± SD |
n (column %) |
Average days undervaccinated Mean ± SD |
| ACIP schedule adherence | ||||
| No days undervaccinated | 839 (23.1) | 0.0 ± 0.0 | 7284 (40.4) | 0.0 ± 0.0 |
| Undervaccination patterns | ||||
| Patterns indicating parental vaccine hesitancy | 666 (18.4) | 297.1 ± 200.1 | 3144 (17.5) | 294.2 ± 213.0 |
| Restrictive shot-limitinga | 54 (1.5) | 211.0 ± 168.3 | 617 (3.4) | 229.3 ± 183.4 |
| Episodic shot-limitingb | 197 (5.4) | 201.5 ± 146.6 | 778 (4.3) | 270.2 ± 189.5 |
| Selective vaccinationc | 415 (11.4) | 353.7 ± 204.9 | 1749 (9.7) | 298.4 ± 190.0 |
| Patterns indicating structural barriers | 2007 (55.3) | 114.0 ± 134.6 | 7327 (40.7) | 66.7 ± 90.2 |
| Initiated all series, but missing doses | 919 (25.3) | 207.5 ± 147.0 | 3381 (18.8) | 116.9 ± 108.8 |
| Completed all doses, but some or all late | 1088 (30.0) | 35.0 ± 39.2 | 3946 (21.9) | 23.8 ± 31.2 |
| Other patterns | ||||
| Delayed startd | 118 (3.3) | 280.2 ± 194.4 | 267 (1.5) | 298.4 ± 190.0 |
ACIP, Advisory Committee on Immunization Practices; AI/AN, American Indian/Alaska Native; SD, standard deviation.
a Restrictive shot-limiting: at least 6 visits with less than or equal to 3 vaccines at each visit.
b Episodic shot-limiting: at least 1 immunization visit with less than or equal to 2 vaccines before age 15 months and no more than 2 immunization visits with greater than or equal to 3 vaccines.
c Selective vaccination: did not start at least one recommended vaccine series.
d Delayed start to vaccination could be indicative of either parental choice or structural barriers accessing immunization services.