Table 1.

The longitudinal mammographic percent density among ER-positive breast cancer patients treated with tamoxifen (N = 40)

Calculated mean percent density (SD)Calculated mean differencea in percent density (SD)Adjusted mean differencea,b in percent density (SE)
Baseline26.5 (18.0)
T122.0 (12.3)−4.5 (11.4)−2.0 (1.2)
T220.2 (12.7)−1.7 (7.6)0.0 (1.2)
T319.1 (12.1)−1.1 (6.9)0.5 (1.1)
T418.6 (11.3)−0.3 (5.8)1.1 (0.9)
T519.3 (11.4)0.6 (6.7)2.1 (1.1)
  • aMean difference, compared with previous year.

  • bEstimated using linear regression, adjusted for baseline percent density (ordinal tertiles).