Table 4.
Odds ratios (ORs) for a positive attitude toward HPV vaccination and corresponding 95% confidence intervals (CIs) for selected confounding and risk factors.
| Confounding-Factor-Only Model a | Final Model b | |||||
|---|---|---|---|---|---|---|
| OR | 95% CI | OR | 95% CI | |||
| Age of children | ||||||
| ≥12 years | 1 c | 1 c | ||||
| <12 years | 0.78 | 0.44 | 1.36 | 0.80 | 0.43 | 1.47 |
| Age of parent | ||||||
| >35 years | 1 c | 1 c | ||||
| ≤35 years | 0.37 d | 0.15 | 0.93 | 0.51 | 0.19 | 1.42 |
| Education level of parent | ||||||
| Under college graduation | 1 c | 1 c | ||||
| College graduate | 1.42 | 0.83 | 2.44 | 1.08 | 0.60 | 1.95 |
| Source of knowledge | ||||||
| Other | 1 c | 1 c | ||||
| HCP | 4.50 | 2.55 | 7.93 | 1.52 | 0.74 | 3.14 |
| Perceived need of more information on HPV vaccine | ||||||
| No | 1 c | 1 c | ||||
| Yes | 1.44 | 0.80 | 2.58 | 1.50 | 0.76 | 2.99 |
| Filled in by | ||||||
| Father | 1 c | |||||
| Mother | 2.27 | 1.21 | 4.26 | |||
| Knowledge of HPV | ||||||
| No | 1 c | |||||
| Yes | 2.49 | 1.22 | 5.11 | |||
| Knowledge of free HPV vaccine | ||||||
| No | 1 c | |||||
| Yes | 2.05 | 1.00 | 4.20 | |||
| Other children vaccinated | ||||||
| No | 1 c | |||||
| Yes | 1.99 | 0.82 | 4.85 | |||
| General attitude toward vaccines | ||||||
| Negative | 1 c | |||||
| Positive | 3.47 | 1.42 | 8.50 | |||
HCP (health care providers). a Estimated from multiple logistic regression models adjusted for confounding factors selected based on the literature. b Estimated from multiple logistic regression models adjusted for confounding factors selected based on the literature and additional risk factors obtained from automatic model selection. c Reference category. d The odds ratios whose confidence intervals do not include unity are indicated in bold typeface.