| Characteristic | Bivariate analysis | Multivariate analysis | ||
|---|---|---|---|---|
| RR (95% CI) | p value | RR (95% CI) | p value | |
| No. of visits caring for pediatric patients | 0.99 (0.99-1.00) | 0.04 | 1.00 (1.00-1.00) | 0.2 |
| Female sex | 1.35 (1.04-1.75) | 0.02 | 1.41 (1.04-1.89) | 0.02 |
| Age, yr | 0.98 (0.97-0.99) | 0.02 | 0.98 (0.97-1.00) | 0.09 |
| Years since graduation | 0.99 (0.98-1.00) | 0.03 | - | - |
| Practice size | 0.99 (0.99-0.99) | 0.002 | 1.00 (1.00-1.00) | 1 |
| Proportion of practice aged 3-18 yr | 0.77 (0.11-5.15) | 0.8 | - | - |
Notes: CI = confidence interval, RR = rate ratio. Practice size determined as number of enrolled patients in the practice. Poisson regression used to model the rate of BP screening; number of recorded BPs was used as outcome, number of patient years follow-up per provider was used as offset; n = 79 care providers. Age and years since graduation were highly correlated; therefore only age was included multivariate model. Only variables with p value < 0.05 in bivariate model were included in the multivariate model. Due to high correlation between age and years since graduation, we only included age in multivariate model.