The relationship between education level and mammographic density

被引:6
作者
Sung, Joohon [1 ,2 ]
Song, Yun-Mi [3 ,4 ]
机构
[1] Seoul Natl Univ, Sch Publ Hlth, Dept Epidemiol, Seoul, South Korea
[2] Seoul Natl Univ, Inst Hlth Environm, Seoul, South Korea
[3] Sungkyunkwan Univ, Sch Med, Dept Family Med, Samsung Med Ctr, Seoul 135710, South Korea
[4] Sungkyunkwan Univ, Samsung Biomed Res Inst, Clin Res Ctr, Sch Med, Seoul 135710, South Korea
基金
新加坡国家研究基金会;
关键词
mammography; menopause; risk factors; socioeconomic status; BREAST-CANCER RISK; SOCIOECONOMIC-STATUS; HEALTHY TWIN; ANTHROPOMETRIC MEASURES; PARENCHYMAL PATTERNS; JAPANESE WOMEN; ASSOCIATION; AREA; FAMILY;
D O I
10.1097/CEJ.0000000000000120
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
To further understand the factors that contribute to interindividual variation in mammographic density, we evaluated the relationship between education level and each component of the mammographic density measures. Study participants included 535 women between 40 and 65 years of age who received a mammogram for a population-based twin and family study. Mammographic density was measured from digital mammograms using a computer-assisted thresholding method. To avoid negative confounding by obesity level, we calculated BMI-adjusted mammographic measures. Thereafter, each of the mammographic density measures was t-transformed using its mean value and SD for each age strata. The level of education was chosen as a marker representing socioeconomic status at the individual level. A linear mixed model considering familial correlations was used for analyses. In the unadjusted analysis for all women, the BMI-adjusted nondense area gradually decreased with an increase in education level (P for trend=0.017). This association persisted after adjusting for menstrual and reproductive factors. When we repeated the analysis according to menopausal status, an inverse association between education level and nondense area was evident in premenopausal women, whereas the inverse association attenuated to a statistically insignificant level after adjusting for menstrual and reproductive factors in postmenopausal women. Absolute dense area and percentage dense area were not associated with education level. The significant association between nondense area and education level after eliminating the effect of age and BMI suggests that socioeconomic factors may have an influential role in determining the amount of fat tissue in the breast.
引用
收藏
页码:491 / 496
页数:6
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