scholarly journals Reproductive Factors and Breast Cancer Risk in Lithuanian Women: A Population-Based Cohort Study

2020 ◽  
Vol 28 (2) ◽  
pp. 29-34
Author(s):  
Laura Steponavičienė ◽  
Rasa Vansevičiūtė ◽  
Lina Zabulienė ◽  
Domantas Jasilionis ◽  
Vincas Urbonas ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Breast Cancer Risk ◽  
Cancer Risk ◽  
Proportional Hazards ◽  
Reproductive Factors ◽  
Population Based ◽  
Number Of Children ◽  
Nulliparous Women ◽  
Hazard Ratios ◽  
Former Ussr

 Background. Although the relationship between reproductive factors and breast cancer is internationally proved, reliable data on former USSR countries are scarce. This study examines the association of parity, age at the first childbirth, number of children, and breast cancer risk in Lithuanian women.Methods. The study that included women from 40 to 79 years old was based on a dataset that was made up linking all records from the 2001 census, all cancer incidence records from the Lithuanian Cancer Registry and all death records from Statistics Lithuania between 6th April 2001 and 31st December 2009. Cox’s proportional hazards regression models were used to estimate the hazard ratios (HRs) for parity, age at the first childbirth, and number of children.Results. If compared to nulliparous women, parous women had a lower risk of breast cancer (HR=0.84, 95% CI 0.78–0.89) and this risk further decreased with an increasing number of children. Women who gave birth after the age of 25 had a significantly higher risk of breast cancer. This disadvantage became statistically insignificant or decreased after controlling for total number of children.Conclusions. Parity and age at the first childbirth are strong predictors of breast cancer risk among Lithuanian women.

Reproductive factors and breast cancer risk in Lithuanian women: A population-based cohort study

2018 ◽  
Vol 92 ◽  
pp. S30
Author(s):  
L. Steponavičiene ◽  
R. Vanseviciute ◽  
L. Zabuliene ◽  
D. Jasilionis ◽  
G. Smailyte
Keyword(s):  
Breast Cancer ◽  
Cohort Study ◽  
Breast Cancer Risk ◽  
Cancer Risk ◽  
Reproductive Factors ◽  
Population Based

scholarly journals Interactions between genetic and reproductive factors in breast cancer risk in a population-based sample of African-American families

2002 ◽  
Vol 22 (4) ◽  
pp. 285-297 ◽  
Author(s):  
Val�rie Chaudru ◽  
Amelia Laing ◽  
Georgia M. Dunston ◽  
Lucile L. Adams-Campbell ◽  
Rosemary Williams ◽  
...  
Keyword(s):  
Breast Cancer ◽  
African American ◽  
Breast Cancer Risk ◽  
Cancer Risk ◽  
Reproductive Factors ◽  
Population Based ◽  
African American Families ◽  
American Families

scholarly journals Concurrent Use in Taiwan of Chinese Herbal Medicine Therapies among Hormone Users Aged 55 Years to 79 Years and Its Association with Breast Cancer Risk: A Population-Based Study

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Yueh-Ting Tsai ◽  
Jung-Nien Lai ◽  
Chien-Tung Wu ◽  
Shun-Ku Lin
Keyword(s):  
Breast Cancer ◽  
Breast Cancer Risk ◽  
Cancer Risk ◽  
Proportional Hazards ◽  
Population Based ◽  
Cox Proportional Hazards ◽  
Research Database ◽  
Herbal Products ◽  
Chinese Herbal ◽  
Concurrent Use

Background. The purpose of the present study was to analyze the concurrent use of Chinese herbal products (CHPs) among women aged 55 to 79 years who had also been prescribed hormonal therapies (HT) and its association with breast cancer risk.Methods. The use, frequency of service, and CHP prescribed among 17,583 HT users were evaluated from a random sample of 1 million beneficiaries from the National Health Insurance Research Database. A logistic regression method was used to identify the factors that were associated with the coprescription of a CHP and HT. Cox proportional hazards regressions were performed to calculate the hazard ratios (HRs) of breast cancer between the TCM nonusers and women who had undergone coadministration of HT and a CHP or CHPs.Results. More than one out of every five study subjects used a CHP concurrently with HT (CHTCHP patients).Shu-Jing-Huo-Xie-Tangwas the most commonly used CHP coadministered with HT. In comparison to HT-alone users, the HRs for invasive breast cancer among CHTCHP patients were not significantly increased either in E-alone group or in mixed regimen group.Conclusions. The coadministration of hormone regimen and CHPs did not increase the risk of breast cancer.

scholarly journals Associations of reproductive breast cancer risk factors with breast tissue composition

2021 ◽  
Vol 23 (1) ◽  
Author(s):  
Lusine Yaghjyan ◽  
Rebecca J. Austin-Datta ◽  
Hannah Oh ◽  
Yujing J. Heng ◽  
Adithya D. Vellal ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Risk Factors ◽  
Breast Cancer Risk ◽  
Cancer Risk ◽  
Reproductive Factors ◽  
Tissue Type ◽  
Health Study ◽  
Cancer Risk Factors ◽  
Number Of Children ◽  
Breast Cancer Risk Factors

Abstract Background We investigated the associations of reproductive factors with the percentage of epithelium, stroma, and fat tissue in benign breast biopsy samples. Methods This study included 983 cancer-free women with biopsy-confirmed benign breast disease (BBD) within the Nurses’ Health Study and Nurses’ Health Study II cohorts. The percentage of each tissue type (epithelium, stroma, and fat) was measured on whole-section images with a deep-learning technique. All tissue measures were log-transformed in all the analyses to improve normality. The data on reproductive variables and other breast cancer risk factors were obtained from biennial questionnaires. Generalized linear regression was used to examine the associations of reproductive factors with the percentage of tissue types, while adjusting for known breast cancer risk factors. Results As compared to parous women, nulliparous women had a smaller percentage of epithelium (β = − 0.26, 95% confidence interval [CI] − 0.41, − 0.11) and fat (β = − 0.34, 95% CI − 0.54, − 0.13) and a greater percentage of stroma (β = 0.04, 95% CI 0.01, 0.08). Among parous women, the number of children was inversely associated with the percentage of stroma (β per child = − 0.01, 95% CI − 0.02, − 0.00). The duration of breastfeeding of ≥ 24 months was associated with a reduced proportion of fat (β = − 0.30, 95% CI − 0.54, − 0.06; p-trend = 0.04). In a separate analysis restricted to premenopausal women, older age at first birth was associated with a greater proportion of epithelium and a smaller proportion of stroma. Conclusions Our findings suggest that being nulliparous as well as having a fewer number of children (both positively associated with breast cancer risk) is associated with a smaller proportion of epithelium and a greater proportion of stroma, potentially suggesting the importance of epithelial-stromal interactions. Future studies are warranted to confirm our findings and to elucidate the underlying biological mechanisms.

scholarly journals Body mass index and breast cancer risk in Japan: a pooled analysis of eight population-based cohort studies

2014 ◽  
Vol 25 (2) ◽  
pp. 519-524 ◽  
Author(s):  
K. Wada ◽  
C. Nagata ◽  
A. Tamakoshi ◽  
K. Matsuo ◽  
I. Oze ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Body Mass Index ◽  
Breast Cancer Risk ◽  
Cancer Risk ◽  
Cohort Studies ◽  
Body Mass ◽  
Population Based ◽  
Pooled Analysis

scholarly journals Cabbage and Sauerkraut Consumption in Adolescence and Adulthood and Breast Cancer Risk among US-Resident Polish Migrant Women

2021 ◽  
Vol 18 (20) ◽  
pp. 10795
Author(s):  
Dorothy Rybaczyk Pathak ◽  
Aryeh D. Stein ◽  
Jian-Ping He ◽  
Mary M. Noel ◽  
Larry Hembroff ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Breast Cancer Risk ◽  
Cancer Risk ◽  
Vegetable Intake ◽  
Conditional Logistic Regression ◽  
The United States ◽  
Population Based ◽  
Cook County ◽  
Migrant Women ◽  
Incidence And Mortality

Background: Breast cancer (BC) incidence and mortality are lower in Poland than in the United States (US). However, Polish-born migrant women to US approach the higher BC mortality rates of US women. We evaluated the association between consumption of cabbage/sauerkraut foods and BC risk in Polish-born migrants to US. Methods: We conducted a case–control study of BC among Polish-born migrants in Cook County and the Detroit Metropolitan Area. Cases (n = 131) were 20–79 years old with histological/cytological confirmation of invasive BC. Population-based controls (n = 284) were frequency matched to cases on age and residence. Food frequency questionnaires assessed diet during adulthood and age 12–13 years. Odds ratios (OR) and 95% confidence intervals (95% CI) were estimated with conditional logistic regression. Consumption of total, raw/short-cooked, and long-cooked cabbage/sauerkraut foods was categorized as low, medium, or high (frequency of servings/week). Results: Higher consumption of total and raw/short-cooked cabbage/sauerkraut foods, during both adolescence and adulthood, was associated with a significantly lower BC risk. Consumption of long-cooked cabbage/sauerkraut foods was low and not significantly associated with risk. The multivariate OR for total cabbage/sauerkraut consumption, high vs. low (> 4 vs. ≤ 2 servings/week) during adolescence was 0.36 (95% CI = 0.18–0.71, ptrend < 0.01) and 0.50 (95% CI = 0.23–1.06, ptrend = 0.08) during adulthood. For raw/short-cooked cabbage/sauerkraut (>3 vs. ≤1.5 servings/week), the ORs were 0.35 (95% CI = 0.16–0.72, ptrend < 0.01) during adolescence and 0.37 (95% CI = 0.17–0.78, ptrend < 0.01) during adulthood. For joint adolescent/adult consumption of raw/short-cooked cabbage/sauerkraut foods, (high, high) vs. (low, low), the OR was 0.23 (95% CI = 0.07–0.65). The significant association for high adolescent consumption of raw/short-cooked cabbage/sauerkraut foods and reduced BC risk was consistent across all levels of consumption in adulthood. Conclusion: Greater consumption of total and raw/short-cooked cabbage/sauerkraut foods either during adolescence or adulthood was associated with significantly reduced BC risk among Polish migrant women. These findings contribute to the growing literature suggesting a protective effect of a potentially modifiable factor, cruciferous vegetable intake, on breast cancer risk.

Sign in / Sign up

Export Citation Format

Share Document