Mammographic breast glandularity in Malaysian women: data derived from radiography
OBJECTIVE. This study was undertaken to estimate mammographic breast glandularity in Malaysian women from radiographic data. MATERIALS AND METHODS. A mammography X-ray unit was used to expose different thicknesses of phantom material of varying glandular and adipose composition at 27 kV. A least...
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| Main Authors: | , , , , |
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| Format: | Article |
| Published: |
American Roentgen Ray Society (ARRS)
2004
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| Subjects: | |
| Online Access: | http://eprints.um.edu.my/491/ https://www.ajronline.org/doi/10.2214/ajr.182.3.1820713 |
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| Summary: | OBJECTIVE. This study was undertaken to estimate mammographic breast glandularity in Malaysian women from radiographic data.
MATERIALS AND METHODS. A mammography X-ray unit was used to expose different thicknesses of phantom material of varying glandular and adipose composition at 27 kV. A least squares method was then used to fit the combined data of phantom glandularity, thickness, and milliampere-seconds. The subsequent fitted equation was then applied to calculate breast glandularity for 705 women who underwent diagnostic mammography, who were drawn equally from the three major ethnic groups of Malaysia: Malay, Chinese, and Indian. The difference in breast glandularity among ethnic groups was tested for significance using the nonparametric Kruskal-Wallis test.
RESULTS. The fitted equation gave an absolute error of less than or equal to ± 8% when applied to the data from phantom exposure. The average breast glandularity of the study sample was 48.9% ± 18.7%. Breast glandularity was found to decrease with breast thickness and age.
CONCLUSION. No significant difference was seen in breast glandularity among the ethnic groups (p > 0.05, Kruskal-Wallis test). |
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