Table 3.
Clinical and sociodemographic correlates of follow-up CHIAS scores by subfactora.
| CHIAS Score (Points)b |
||||
|---|---|---|---|---|
| Covariate | Barriers | Harms | Ineffectiveness | Uncertainties |
| Baseline Subfactor Score | 0.3 (0.1), p < 0.01 | 0.5 (0.1), p < 0.01 | 0.4 (0.1), p < 0.01 | 0.5 (0.1), p < 0.01 |
| Age at Sampling | ||||
| 15 Years vs. 16 Years | --c | -- | -- | 0.6 (0.3), p = 0.04 |
| Household Size at Baselined | ||||
| Small vs. Medium | -- | -- | 1.2 (0.4), p < 0.01 | 0.3 (0.3), p = 0.46 |
| Large vs. Medium | -- | -- | 0.2 (0.5), p = 0.64 | 1.2 (0.4), p < 0.01 |
| Unknown vs. Medium | -- | -- | 0.4 (0.9), p = 0.64 | -0.7 (0.7), p = 0.38 |
| ≥1 Prior HPV Vaccine | ||||
| Yes vs. No | -- | -0.8 (0.3), p = 0.02 | -- | -0.8 (0.3), p < 0.01 |
| Healthcare Provider Recommendation of HPV Vaccine in the Last Year | ||||
| Yes vs. No | -- | -1.1 (0.5), p = 0.02 | -- | -1.6 (0.4), p < 0.01 |
| Unknown vs. No | -- | -1.3 (0.5), p = 0.02 | -- | -1.3 (0.5), p = 0.01 |
| Discussed HPV Vaccine with Parents in the Last Year | ||||
| Yes vs. No | -1.3 (0.4), p < 0.01 | -- | -- | -- |
| Unknown vs. No | 0.5 (0.8), p = 0.56 | -- | -- | -- |
| Internet, Trusted Source of Information on HPV Vaccine | ||||
| Yes vs. No | -- | -- | -- | 0.6 (0.3), p = 0.03 |
Manual forward model selection was used to generate a single multivariable linear regression model from covariates that met a p < 0.10 threshold in bivariate models.
Values are reported as point estimate (SE), p value. Compared to the reference category, or a 1-unit increase for continuous predictor variables, positive values indicate a higher CHIAS subfactor score and negative values indicate a lower (more favorable) CHIAS subfactor score. For example, 15 year old adolescents had a mean CHIAS uncertainties score that was 0.6 (0.3) points higher than 16 year old adolescents.
“–”indicates variable excluded from final multivariable model.
Household size was categorized as follows: small (2–3 members), medium (4–5 members), large (6+ members), and unknown.