Table 3.
Adjusted differences (aDs) and adjusted differences in differences (aDDs) in UTD HPV vaccination prevalence for younger and older initiators, adolescents aged 13–17 years, NIS-Teen 2016–2020.
| aDa | aDD a | p-value | aDa | aDD a | p-value | aDa | aDD a | p-value | aDa | aDD a | p-value | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sex | Male vs. Female | |||||||||||
| Younger initatiors | 0.01 | −0.07 | .02 | — | — | — | — | — | — | — | — | — |
| Older Initiators | −0.05 | — | — | — | — | — | — | — | — | — | — | — |
| Raceb | Hispanic vs. NH White | NH Black vs. NH White | Other vs. NH White | |||||||||
| Younger initatiors | 0.01 | 0.02 | .50 | −0.02 | 0.01 | .75 | 0.01 | 0.01 | .79 | — | — | — |
| Older Initiators | 0.03 | — | — | 0 | — | — | 0.02 | — | — | — | — | — |
| Insurance | Uninsured vs. Private | Medicaid vs. Private | Other vs. Private | |||||||||
| Younger initatiors | −0.02 | −0.11 | .01 | −0.01 | 0.02 | .34 | 0.01 | −0.01 | .69 | — | — | — |
| Older Initiators | −0.13 | — | — | 0.02 | — | — | 0 | — | — | — | — | — |
| Poverty Status | <100% FPL vs. > = 100% FPL | |||||||||||
| Younger initatiors | 0 | −0.01 | .70 | — | — | — | — | — | — | — | — | — |
| Older Initiators | −0.01 | — | — | — | — | — | — | — | — | — | — | — |
| Region | Northeast vs. Midwest | Northeast vs. South | Northeast vs. West | |||||||||
| Younger initatiors | −0.04 | 0.01 | .57 | −0.04 | −0.03 | .15 | −0.06 | 0.01 | .85 | — | — | — |
| Older Initiators | −0.03 | — | — | −0.07 | — | — | −0.05 | — | — | — | — | — |
| Facility Type | Public vs. Private | Hospital vs. Private | All STD/School/Teen clinic vs. Private | Mixed vs. Private | ||||||||
| Younger initatiors | −0.05 | −0.02 | .65 | 0 | 0 | .89 | −0.01 | −0.04 | .47 | −0.02 | 0.01 | .76 |
| Older Initiators | −0.08 | — | — | 0 | — | — | −0.05 | — | — | −0.01 | — | — |
| Current Age* | 14 vs. 13 | 15 vs. 13 | 16 vs. 13 | 17 vs. 13 | ||||||||
| Younger initatiors | −0.04 | 0.15 | < .001 | 0.01 | 0.15 | < .001 | −0.01 | 0.19 | < .001 | 0.03 | 0.14 | <.001 |
| Older Initiators | 0.11 | — | — | 0.16 | — | — | 0.18 | — | — | 0.17 | — | — |
| Year | 2017 vs. 2016 | 2018 vs. 2016 | 2019 vs. 2016 | 2020 vs. 2016 | ||||||||
| Younger initatiors | −0.08 | 0.1 | .01 | −0.03 | 0.07 | < .001 | −0.08 | 0.13 | .01 | −0.02 | 0.09 | <.001 |
| Older Initiators | 0.03 | — | — | 0.04 | — | — | 0.05 | — | — | 0.07 | — | — |
NH: non-Hispanic. FPL: Federal poverty level. STD: Sexually transmitted disease. aD: Differences in adjusted predicted marginals. aDD: Difference-in-differences of adjusted predicted marginals.
aaDs and aDDs are adjusted by all variables in table. Bold estimates are statistically significant.
bNH Other includes non-Hispanic Asian, non-Hispanic American Indian and Alaskan Native, and non-Hispanic individuals of multiple races.
*Current age refers to age of adolescent at time of participation in the survey.