Table 3.
Multivariable model: likelihood of refusal to participate versus willing to participate in the Radiological Evaluation And Breast Density (READ) study.
| ET | EPT | Overall | |
|---|---|---|---|
| OR* (95% CI) | OR* (95% CI) | OR* (95% CI) | |
| Age at recruitment | |||
| ≤ 55 | 1.00 | 1.00 | 1.00 |
| 56–60 | 0.94 (0.75, 1.18) | 1.18 (0.91, 1.53) | 1.03 (0.87, 1.23) |
| 61–65 | 0.90 (0.71, 1.15) | 1.12 (0.83, 1.52) | 0.98 (0.81, 1.18) |
| 66–70 | 1.00 (0.76, 1.31) | 1.65 (1.12, 2.43) | 1.15 (0.93, 1.44) |
| 71+ | 1.43 (1.09, 1.88) | 1.25 (0.82, 1.90) | 1.39 (1.11, 1.74) |
| Caucasian | |||
| No | 1.17 (0.89, 1.53) | 1.22 (0.81, 1.84) | 1.18 (0.94, 1.48) |
| Yes | 1.00 | 1.00 | 1.00 |
| Education | |||
| ≤High school | 1.22 (0.94, 1.58) | 1.51 (1.05, 2.17) | 1.27 (1.04, 1.57) |
| Some college | 1.04 (0.84, 1.30) | 1.00 (0.77, 1.28) | 1.03 (0.87, 1.21) |
| College graduate | 1.05 (0.81, 1.37) | 1.08 (0.81, 1.44) | 1.07 (0.88, 1.30) |
| ≥Graduate school | 1.00 | 1.00 | 1.00 |
| Body mass index in kg/m2, at index mammogram | |||
| <25 | 1.30 (1.06, 1.58) | 1.06 (0.81, 1.39) | 1.22 (1.04, 1.43) |
| 25 to <30 | 0.98 (0.80, 1.20) | 0.98 (0.74, 1.30) | 0.99 (0.84, 1.17) |
| 30+ | 1.00 | 1.00 | 1.00 |
| First degree family history | |||
| No | 1.00 | 1.00 | 1.00 |
| Yes | 1.08 (0.88, 1.33) | 0.71 (0.54, 0.93) | 0.94 (0.79, 1.10) |
*
OR= Odds ratio, adjusted for all other factors listed in the table