• 1. Department of Epidemiology and Statistics, West China School of Public Health and West China Fourth Hospital of Sichuan University, Chengdu, 610041, P.R.China;
  • 2. Department of Head, Neck, Mammary Gland Oncology, and Medical Oncology Cancer Center, West China Hospital of Sichuan University, Chengdu, 610041, P.R.China;
  • 3. Department of Hospital Infection Management, Sichuan Provincial Hospital for Women and Children, Chengdu, 610031, P.R.China;
  • 4. Department of Maternal and Child Information, Shuangliu Maternal and Child Health Hospital, Chengdu, 610200, P.R.China;
  • 5. Department of National Office for Maternal and Child Health Surveillance of China, West China Second University Hospital of Sichuan University, Chengdu, 610041, P.R.China;
LI Jiayuan, Email: lijiayuan73@163.com
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Objectives To explore the construction method of prediction model of absolute risk for breast cancer and provide personalized breast cancer management strategies based on the results.Methods A case-control design was conducted with 2 747 individuals diagnosed as primary breast cancer by pathology in West China Hospital of Sichuan University from 2000 to 2017 and 6 307 healthy controls from Breast Cancer Screening Cohort in Sichuan Women and Children Center and Chengdu Shuangliu District Maternal and Child Health Hospital. Standardized questionnaires and information management systems in hospital were used to collect information. Decision trees, logistic regression, the formula in Gail model and registration data in China were used to estimate the probability of 5-year risk of breast cancer. Eventually a ROC (receiver operating characteristics) curve was drawn to identify optimal cut-off value, and the power was evaluated.Results The decision tree exported 4 variables, which were urban or rural sources, number of live birth, age and age at menarche. The median 5-year risk and interquartile range of the controls was 0.027% and 0.137%, while the median 5-year risk and interquartile range of the cases was 0.219% and 0.256%. The ROC curve showed the cut-off value was 0.100%. Through verification, the sensitivity was 0.79, the specificity was 0.73, the accuracy was 0.75, and the AUC (area under the curve) was 0.79.Conclusions The methods used in our study based on 9 054 female individuals in Sichuan province could be used to predict the 5-year risk for breast cancer. Predictor variables include urban or rural sources, number of live birth, age, and age at menarche. If the 5-year risk is more than 0.100%, the person will be judged as a high risk individual.

Citation: DIAO Sha, HOU Can, ZHONG Xiaorong, LI Qin, LI Xu, ZHOU Min, YUAN Xuelian, YI Fang, LI Jiachang, HAO Yu, LI Jiayuan. Development of a prediction model of absolute risk for breast cancer. Chinese Journal of Evidence-Based Medicine, 2019, 19(12): 1388-1394. doi: 10.7507/1672-2531.201907008 Copy

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