Dataset Information

Associations of pregnancy-related factors and birth characteristics with risk of endometrial cancer: A Nordic population-based case-control study.

ABSTRACT: Many pregnancy-related factors are associated with reduced endometrial cancer risk. However, it remains unclear whether pregnancy-related complications (e.g., hypertensive conditions) are associated with risk and whether these associations vary by endometrial cancer subtype. Thus, we evaluated the risk of endometrial cancer, overall and by subtype, in relation to pregnancy-related factors, pregnancy complications and birth characteristics. Utilizing population-based register data from four Nordic countries, we conducted a nested case-control analysis of endometrial cancer risk. We included 10,924 endometrial cancer cases and up to 10 matched controls per case. Odds ratios (ORs) with 95% confidence intervals (CIs) were derived from unconditional logistic regression models. We further evaluated associations by individual histology (i.e., endometrioid, serous, etc.) or, for rare exposures (e.g., pregnancy complications), by dualistic type (Type I [n = 10,343] and Type II [n = 581]). Preexisting and pregnancy-related hypertensive conditions were associated with increased endometrial cancer risk (OR [95% CI]: preexisting hypertension 1.88 [1.39-2.55]; gestational hypertension 1.47 [1.33-1.63]; preeclampsia 1.43 [1.30-1.58]), with consistent associations across dualistic type. Increasing number of pregnancies (?4 vs. 1 birth: 0.64 [0.59-0.69]) and shorter time since last birth (<10 vs. ?30?years: 0.34 [0.29-0.40]) were associated with reduced endometrial cancer risk, with consistent associations across most subtypes. Our findings support the role for both hormonal exposures and cell clearance as well as immunologic/inflammatory etiologies for endometrial cancer. This research supports studying endometrial hyperplasia, a precursor condition of endometrial cancer, in the context of pregnancy-related exposures, as this may provide insight into the mechanisms by which pregnancy affects subsequent cancer risk.

SUBMITTER: Trabert B

PROVIDER: S-EPMC6898733 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature

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Associations of pregnancy-related factors and birth characteristics with risk of endometrial cancer: A Nordic population-based case-control study.

Trabert Britton B Troisi Rebecca R Grotmol Tom T Ekbom Anders A Engeland Anders A Gissler Mika M Glimelius Ingrid I Madanat-Harjuoja Laura L Sørensen Henrik Toft HT Tretli Steinar S Gulbech Ording Anne A Bjørge Tone T

International journal of cancer 20190620 6

Many pregnancy-related factors are associated with reduced endometrial cancer risk. However, it remains unclear whether pregnancy-related complications (e.g., hypertensive conditions) are associated with risk and whether these associations vary by endometrial cancer subtype. Thus, we evaluated the risk of endometrial cancer, overall and by subtype, in relation to pregnancy-related factors, pregnancy complications and birth characteristics. Utilizing population-based register data from four Nordi ...[more]

PMID: 31173648

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Project description:ObjectiveTo examine associations between birth defects and cancer from birth into adulthood.DesignPopulation based nested case-control study.SettingNationwide health registries in Denmark, Finland, Norway, and Sweden.Participants62 295 cancer cases (0-46 years) and 724 542 frequency matched controls (matched on country and birth year), born between 1967 and 2014.Main outcome measuresRelative risk of cancer in relation to major birth defects, estimated as odds ratios with 99% confidence intervals from logistic regression models.ResultsAltogether, 3.5% (2160/62 295) of cases and 2.2% (15 826/724 542) of controls were born with major birth defects. The odds ratio of cancer for people with major birth defects compared with those without was 1.74 (99% confidence interval 1.63 to 1.84). For individuals with non-chromosomal birth defects, the odds ratio of cancer was 1.54 (1.44 to 1.64); for those with chromosomal anomalies, the odds ratio was 5.53 (4.67 to 6.54). Many structural birth defects were associated with later cancer in the same organ system or anatomical location, such as defects of the eye, nervous system, and urinary organs. The odds ratio of cancer increased with number of defects and decreased with age, for both non-chromosomal and chromosomal anomalies. The odds ratio of cancer in people with any non-chromosomal birth defect was lower in adults (≥20 years: 1.21, 1.09 to 1.33) than in adolescents (15-19 years: 1.58, 1.31 to 1.90) and children (0-14 years: 2.03, 1.85 to 2.23). The relative overall cancer risk among adults with chromosomal anomalies was markedly reduced from 11.3 (9.35 to 13.8) in children to 1.50 (1.01 to 2.24). Among adults, skeletal dysplasia (odds ratio 3.54, 1.54 to 8.15), nervous system defects (1.76, 1.16 to 2.65), chromosomal anomalies (1.50, 1.01 to 2.24), genital organs defects (1.43, 1.14 to 1.78), and congenital heart defects (1.28, 1.02 to 1.59) were associated with overall cancer risk.ConclusionsThe increased risk of cancer in individuals with birth defects persisted into adulthood, both for non-chromosomal and chromosomal anomalies. Further studies on the molecular mechanisms involved are warranted.

Project description:OBJECTIVES: The study was carried out to investigate the prevalence, risk factors, and Pregnancy outcome in anti-HCV-positives pregnant women admitted for delivery in the Department of Obstetrics & Gynecology of Guru Gobind Singh Medical College and Hospital, Faridkot between January 2010 and January 2013. SETTING: Department of obstetrics and Gynaecology of GGS Medical College and Hospital, Faridkot. MATERIAL AND METHODS: A case-control study design was selected for the study. A total of 1412 pregnant women presenting in the labor room of our hospital between January 2010 and January 2013 were subjected to anti-HCV testing by third generation ELISA. Age, parity, and gestational age-matched controls were taken from the women delivering during the same time frame who tested negative for hepatitis C. All the subjects and controls were non-reactive for HIV and HBsAg as well. Risk factors and pregnancy outcome were compared with the control group. Approval was taken from ethic committee of the institute. The women who consented to participate in the study were evaluated on the basis of a questionnaire for the presence of risk factors of hepatitis C and pregnancy outcome. Women with the known previous liver disease were excluded from the study. Data were analyzed using SPSS for Windows version 16.0. p < 0.05 was considered significant. RESULTS: Forty patients tested positive for anti-HCV antibodies among 1,412 patients subjected to anti-HCV testing during study period. 40 patients were taken as controls, who were negative for anti-HCV antibodies. Prevalence of HCV during pregnancy was 2.8 % in our study. Among the risk factors studied, previous surgery and blood transfusion were the statistically significant risk factors. There was history of previous major surgery in 16 cases versus 4 controls and was statistically significant (p value 0.002) at p < 0.05. History of blood transfusion was present in 4 versus 2 among cases and controls, respectively, and statistically significant (p value 0.004) at p < 0.05. Sexual transmission was not the risk factor as none of the spouse of the pregnant women was positive for HCV antibodies. Neonatal outcome was similar in both groups. Pregnancy complications i.e., Pregnancy-induced hypertension and antepartum hemorrhage were significantly higher in study group compared to control group. CONCLUSION: Incidence of hepatitis C virus infection in pregnancy is 2.8 %. Surgical procedures, blood transfusion, are the major risk factors for transmission. There are no identifiable risk factors in 35 % of cases. Pregnancy complications like Pregnancy-induced hypertension and antepartum hemorrhage are more common in HCV-positive mothers. Neonatal outcome is not affected. Universal screening of all pregnant women should be done for HCV as many patients may not have any risk factor.

Project description:BackgroundBirth asphyxia is of significant concern because it impacts newborn health from low to severe levels. In Thailand, birth asphyxia remains a leading cause of delayed developmental health in children under 5 years old. The study aimed to determine the maternal, fetal and health service factors contributing to birth asphyxia.MethodsA case-control design was conducted on a sample of 4256 intrapartum chart records. The samples were selected based on their Apgar scores in the first minute of life. A low Apgar score (≤ 7) was chosen for the case group (852) and a high Apgar score (> 7) for the control group (3408). In addition, a systematic random technique was performed to select 23 hospitals, including university, advanced and secondary, in eight health administration areas in Thailand for evaluating the intrapartum care service. Data analysis was conducted using SPSS statistical software.ResultsThe odds of birth asphyxia increases in the university and advanced hospitals but the university hospitals had the highest quality of care. The advanced and secondary hospitals had average nurse work-hours per week of more than 40 h. Multivariable logistic regression analysis found that intrapartum care services and maternal-fetal factors contributed to birth asphyxia. The odd of birth asphyxia increases significantly in late-preterm, late-term pregnancies, low-birth weight, and macrosomia. Furthermore, maternal comorbidity, non-reassuring, and obstetric emergency conditions significantly increase the odd of birth asphyxia. In addition, an excellent quality of intrapartum care, a combined nursing model, low nurse work-hours, and obstetrician-conducted delivery significantly reduced birth asphyxia.ConclusionBirth asphyxia problems may be resolved in the health service management offered by reducing the nurse work-hours. Excellent quality of care required the primary nursing care model combined with a team nursing care model. However, careful evaluation and monitoring are needed in cases of comorbidity, late-preterm, late-term pregnancies, low-birth weight, and macrosomia. Furthermore, increasing the obstetrician availability in obstetric emergencies and non-reassuring fetal status is important.

Project description:ObjectiveTo examine the relationship between maternal characteristics, serum biomarkers and preterm birth (PTB) by spontaneous and medically indicated subtypes.DesignPopulation-based cohort.SettingCalifornia, United States of America.PopulationFrom a total population of 1 004 039 live singleton births in 2009 and 2010, 841 665 pregnancies with linked birth certificate and hospital discharge records were included.MethodsCharacteristics were compared for term and preterm deliveries by PTB subtype using logistic regression and odds ratios adjusted for maternal characteristics and obstetric factors present in final stepwise models and 95% confidence intervals. First-trimester and second-trimester serum marker levels were analysed in a subset of 125 202 pregnancies with available first-trimester and second-trimester serum biomarker results.Main outcome measurePTB by subtype.ResultsIn fully adjusted models, ten characteristics and three serum biomarkers were associated with increased risk in each PTB subtype (Black race/ethnicity, pre-existing hypertension with and without pre-eclampsia, gestational hypertension with pre-eclampsia, pre-existing diabetes, anaemia, previous PTB, one or two or more previous caesarean section(s), interpregnancy interval ? 60 months, low first-trimester pregnancy-associated plasma protein A, high second-trimester ?-fetoprotein, and high second-trimester dimeric inhibin A). These risks occurred in 51.6-86.2% of all pregnancies ending in PTB depending on subtype. The highest risk observed was for medically indicated PTB <32 weeks in women with pre-existing hypertension and pre-eclampsia (adjusted odds ratio 89.7, 95% CI 27.3-111.2).ConclusionsOur findings suggest a shared aetiology across PTB subtypes. These commonalities point to targets for further study and exploration of risk reduction strategies.Tweetable abstractFindings suggest a shared aetiology across preterm birth subtypes. Patterns may inform risk reduction efforts.

Dataset Information

Associations of pregnancy-related factors and birth characteristics with risk of endometrial cancer: A Nordic population-based case-control study.

Publications

Associations of pregnancy-related factors and birth characteristics with risk of endometrial cancer: A Nordic population-based case-control study.

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