Errata
Abstract
The original article to which this Erratum refers was published in International Journal of Cancer (2002) 102(1) 29–33
Maskarinec G, Nagata C, Shimizu H, Kashiki Y. A comparison of mammographic densities and their determinants in women from Japan and Hawaii. Int. J. Cancer 102, 29–33 (2002).
In the above referenced article, an error occurred when the authors transformed the number of pixels into cm2. Because they were not aware that the software for the Cobrascan CX612T X-ray digitizer applies a linear scaling factor of 1.27 (equivalent to 1.6129 when calculating the size of an area) during scanning, they underestimated the breast sizes and the dense areas in the study population. To allow valid comparisons with other studies, the corrected values are presented here (Bold numbers in Table II).
| Characteristic | Japanese in Gifu | Japanese in Hawaii | Caucasians in Hawaii | p-value | |
|---|---|---|---|---|---|
| Breast size (cm2)1 | Mean | 89.83 | 90.98 | 141.57 | <0.0001 |
| (std) | (33.65) | (39.98) | (70.90) | ||
| Adjusted mean2 | 88.16 | 85.91 | 115.20 | <0.0001 | |
| Dense area (cm2)1 | Mean | 26.91 | 30.90 | 33.62 | 0.105 |
| (std) | (14.65) | (18.04) | (25.42) | ||
| Adjusted mean2 | 23.86 | 28.47 | 30.06 | 0.003 | |
| Percent density | Mean | 31.3 | 36.4 | 28.3 | 0.0001 |
| (std) | (14.4) | (15.9) | (20.3) | ||
| Adjusted mean2 | 29.4 | 35.7 | 31.3 | <0.0001 |
- 1 Logarithmic (area) and square root (dense) transformation was used for significance testing because of non-normal distribution.
- 2 Adjusted for age, menopausal status, number of children, body mass index, and history of ovariectomy.
