Table 4 Multivariable analysis of factors associated with adjunct ultrasonography recommendation (categorical)
Variables | Adjunct ultrasonography recommendation | |
|---|---|---|
Odds radio; 95% CI | p-value | |
Age at enrolment (years) | ||
 < 50 | 1.828 (1.275, 2.620) | 0.001* |
 50 and above | 1.00 (ref.) | |
 Body-mass index (kg/m2) | 0.991 (0.952, 1.033) | 0.678 |
Age at first birth (years) | ||
 < 20 | 1.00 (ref.) |  |
 20–24 | 0.497 (0.116, 2.128) | 0.346 |
 25–29 | 0.597 (0.148, 2.414) | 0.469 |
 ≥ 30 | 0.703 (0.172, 2.880) | 0.624 |
Volumetric Mammographic Density Measurement | ||
 Average % volume density (Volpara) | 1.017 (0.992, 1.041) | 0.186 |
Radiologists | ||
 Radiologist reporting < 180 mammograms | 1.00 (ref.) | 0.000* |
 Radiologist reporting > 360 mammograms | 0.127 (0.089, 0.180) | |