Table 3.
Logistic Regression Model for Routine Mammography Use (N=5,921)
| Variables and Effects | OR | Lower 95% Limit OR | Upper 95% Limit OR |
|---|---|---|---|
| Age | |||
| 45 to 49 | 1.00 | ||
| 50 to 55 | 1.62 | 1.33 | 1.97 |
| 56 to 65 | 1.48 | 1.21 | 1.82 |
| 65+ | 1.12 | 0.89 | 1.42 |
| Projected breast cancer risk | |||
| First quartile (<0.086%) | 1.00 | ||
| Second quartile (0.086% to 1.17%) | 1.38 | 1.12 | 1.69 |
| Third quartile (1.17% to 1.57%) | 1.57 | 1.24 | 1.99 |
| Fourth quartile (>1.57%) | 2.23 | 1.73 | 2.87 |
| Smoking | |||
| Never | 1.00 | ||
| Former | 1.20 | ||
| <1 ppd | 0.70 | 0.56 | 0.87 |
| ≥1 ppd | 0.60 | 0.47 | 0.76 |
| Ratio of family income to poverty (%) | |||
| <125 | 1.00 | ||
| 125 to 299 | 0.99 | 0.78 | 1.25 |
| ≥300 | 1.74 | 1.36 | 2.22 |
| NA | 1.19 | 0.93 | 1.51 |
| Race | |||
| White | 1.00 | ||
| Hispanic | 1.16 | 0.91 | 1.48 |
| Black | 1.32 | 1.06 | 1.65 |
| Other | 0.61 | 0.39 | 0.94 |
| Education | |||
| <9 | 1.00 | ||
| 9 to 12 | 1.04 | 0.77 | 1.40 |
| Higher-secondary grade | 1.61 | 1.23 | 2.11 |
| Bachelors | 2.06 | 1.51 | 2.82 |
| Marital status | |||
| No married | 1.00 | ||
| Married | 1.34 | 1.17 | 1.55 |
| Routine source of care | |||
| No | 1.00 | ||
| Yes | 2.92 | 2.21 | 3.86 |
| Insurance status | |||
| No | 1.00 | ||
| Yes | 2.21 | 1.73 | 2.84 |
| Perceived cancer risk | |||
| Low risk | 1.00 | ||
| Med/high risk | 1.30 | 1.13 | 1.49 |
| Ever had biopsy | |||
| No | 1.00 | ||
| Yes | 5.69 | 3.19 | 10.15 |
OR, odds ratio; ppd, pack per day; NA, not available.