epidemiology Archives - Revista Brasileira de Ginecologia e Obstetrícia

  • Review Article

    Prevalence of Preeclampsia in Brazil: An Integrative Review

    Rev Bras Ginecol Obstet. 2022;44(7):686-691

    Summary

    Review Article

    Prevalence of Preeclampsia in Brazil: An Integrative Review

    Rev Bras Ginecol Obstet. 2022;44(7):686-691

    DOI 10.1055/s-0042-1742680

    Views6

    Abstract

    Objective

    To review literature and estimate the occurrence of preeclampsia and its complications in Brazil.

    Methods

    We performed an integrative review of the literature, and included observational studies published until August 2021 on the SciELO and PubMed databases that evaluated preeclampsia among pregnant women in Brazil. Other variables of interests were maternal death, neonatal death, hemolysis, elevated liver enzymes, and low platelet count (HELLP) syndrome, and eclampsia. Three independent reviewers evaluated all retrieved studies and selected those that met inclusion criteria. A metanalysis of the prevalence of preeclampsia and eclampsia was also performed, to estimate a pooled frequency of those conditions among the studies included.

    Results

    We retrieved 304 studies after the initial search; of those, 10 were included in the final analysis, with a total of 52,986 women considered. The pooled prevalence of preeclampsia was of 6.7%, with a total of 2,988 cases reported. The frequency of eclampsia ranged from 1.7% to 6.2%, while the occurrence of HELLP syndrome was underreported. Prematurity associated to hypertensive disorders ranged from 0.5% to 1.72%.

    Conclusion

    The frequency of preeclampsia was similar to that reported in other international studies, and it is increasing in Brazil, probably due to the adoption of new diagnostic criteria. The development of a national surveillance network would be essential to understand the problem of hypertensive disorders of pregnancy in Brazil.

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    Prevalence of Preeclampsia in Brazil: An Integrative Review
  • Original Article

    Epidemiological Survey on the Perception of Adverse Effects in Women Using Contraceptive Methods in Brazil

    Rev Bras Ginecol Obstet. 2022;44(1):25-31

    Summary

    Original Article

    Epidemiological Survey on the Perception of Adverse Effects in Women Using Contraceptive Methods in Brazil

    Rev Bras Ginecol Obstet. 2022;44(1):25-31

    DOI 10.1055/s-0041-1741410

    Views4

    Abstract

    Objective

    The present study aimed to understand patient perception of the adverse effects of contraceptives to improve health care and adherence to treatment.

    Methods

    An online questionnaire was available for women in Brazil to respond to assess their perception of adverse effects and their relationship with contraceptive methods.

    Results

    Of all 536 women who responded, 346 (64.6%) reported current contraceptive use. One hundred and twenty-two (122-34.8%) women reported having already stopped using contraception because of the adverse effects. As for the contraceptive method used, the most frequent was the combined oral contraceptive (212-39.6%). When we calculated the relative risk for headache, there was a relative risk of 2.1282 (1.3425-3.3739; 95% CI), suggesting that the use of pills increases the risk of headache, as well as edema, in which a relative risk of 1.4435 (1.0177-2.0474; 95% CI) was observed. For low libido, the use of oral hormonal contraceptives was also shown to be a risk factor since its relative risk was 1.8805 (1.3527-2.6142; 95% CI). As for acne, the use of hormonal contraceptives proved to be a protective factor, with a relative risk of 0.3015 (0.1789-0.5082; 95% CI).

    Conclusion

    The choice of a contraceptive method must always be individualized, and the patients must be equal participants in the process knowing the expected benefits and harms of each method and hormone, when present.

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  • Original Article

    Malignant Uterine Neoplasms Attended at a Brazilian Regional Hospital: 16-years Profile and Time Elapsed for Diagnosis and Treatment

    Rev Bras Ginecol Obstet. 2021;43(2):137-144

    Summary

    Original Article

    Malignant Uterine Neoplasms Attended at a Brazilian Regional Hospital: 16-years Profile and Time Elapsed for Diagnosis and Treatment

    Rev Bras Ginecol Obstet. 2021;43(2):137-144

    DOI 10.1055/s-0040-1718434

    Views2

    Abstract

    Objective

    The present study aims to evaluate the profile of endometrial carcinomas and uterine sarcomas attended in a Brazilian cancer center in the period from 2001 to 2016 and to analyze the impact of time elapsed fromsymptoms to diagnoses or treatment in cancer stage and survival.

    Methods

    This observational study with 1,190 cases evaluated the year of diagnosis, age-group, cancer stage and histological type. A subgroup of 185 women with endometrioid histology attended in the period from 2012 to 2017 was selected to assess information about initial symptoms, diagnosticmethods, overall survival, and to evaluate the influence of the time elapsed from symptoms to diagnosis and treatment on staging and survival. The statistics used were descriptive, trend test, and the Kaplan- Meier method, with p-values < 0.05 for significance.

    Results

    A total of 1,068 (89.7%) carcinomas (77.2% endometrioid and 22.8% nonendometrioid) and 122 (10.3%) sarcomas were analyzed, with an increasing trend in the period (p < 0.05). Histologies of non-endometrioid carcinomas, G3 endometrioid, and carcinosarcomas constituted 30% of the cases. Non-endometrioid carcinomas and sarcomas weremore frequently diagnosed in patients over 70 years of age and those on stage IV (p < 0.05). The endometrioid subgroup with 185 women reported 92% of abnormal uterine bleeding and 43% diagnosis after curettage. The average time elapsed between symptoms to diagnosis was 244 days, and between symptoms to treatment was 376 days, all without association with staging (p = 0.976) and survival (p = 0.160). Only 12% of the patients started treatment up to 60 days after diagnosis.

    Conclusion

    The number of uterine carcinoma and sarcoma cases increased over the period of 2001 to 2016. Aggressive histology comprised 30% of the patients and, for endometrioid carcinomas, the time elapsed between symptoms and diagnosis or treatment was long, although without association with staging or survival.

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    Malignant Uterine Neoplasms Attended at a Brazilian Regional Hospital: 16-years Profile and Time Elapsed for Diagnosis and Treatment
  • Original Article

    Trends Associated with Stillbirth in a Maternity Hospital School in the North Zone of São Paulo: A Cross-Sectional Study

    Rev Bras Ginecol Obstet. 2019;41(10):597-606

    Summary

    Original Article

    Trends Associated with Stillbirth in a Maternity Hospital School in the North Zone of São Paulo: A Cross-Sectional Study

    Rev Bras Ginecol Obstet. 2019;41(10):597-606

    DOI 10.1055/s-0039-1693984

    Views8

    Abstract

    Objective

    To evaluate conditions associated with stillbirth (SB), and possible trends related with it, in a maternity hospital school in the North zone of São Paulo.

    Methods

    An observational, cross-sectional study conducted at the Hospital Maternidade- escola de Vila Nova Cachoeirinha with 1,139 SBs in the period of 2003 to 2017. Cases of intermediate SB (ISB) (weight between 500 and 999 g) and late SB (LSB) (weight ≥ 1,000 g) were compared. We evaluated clinical data, laboratory tests, and fetal and placental studies. Data were stored in Windows Excel (Microsoft Corp., Redmond, WA, USA) worksheets, according to which graphs and tables were constructed. We used the statistical software SPSS for Windows version 18.0 (SPSS In., Chicago, IL, USA), estimating the prevalence ratio (PR) and odds ratio (OR), considering the 95% confidence interval (95% CI).

    Results

    The general SB rate was 11.9%, and the in-hospital SB rate was 2.8%. Pregnant women younger than 16 years of age were more likely to have ISB (OR 0.32, 0.15- 0.76), while patients older than 40 years old had a higher chance of LSB (PR 0.85, 0.72- 0.99). A total of 25.7% of the general population did not have prenatal care, and 77.1% of the cases presented fetal death at admission. The cases of ISB had a statistically significant association with home birth (OR 0.61, 0.46-0.80). Cesarean section was performed in 16.1% of the subjects, and misoprostol was the most used method for induction. Necropsy and placental study of the fetuses were performed, respectively, in 94.2% and 97.3% of the cases. Associated causes were not identified in 22.1% of the cases, and the main causes identified were amniotic sac infections (27.9%), fetal malformations (12.5%), placental abruption (11.2%), hypertensive syndromes (8.5%), and maternal syphilis (3.9%), the latter with an increasing trend.

    Conclusion

    Among the factors associated to SB were: hypertensive syndromes, amniotic sac infections, fetal malformations, placental abruption and syphilis. There was a growing trend in the number of cases of syphilis, which translates an alert. Diagnostic limitations justify indeterminate causes.

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    Trends Associated with Stillbirth in a Maternity Hospital School in the North Zone of São Paulo: A Cross-Sectional Study
  • Original Article

    Cervical Cancer Registered in Two Developed Regions from Brazil: Upper Limit of Reachable Results from Opportunistic Screening

    Rev Bras Ginecol Obstet. 2018;40(6):347-353

    Summary

    Original Article

    Cervical Cancer Registered in Two Developed Regions from Brazil: Upper Limit of Reachable Results from Opportunistic Screening

    Rev Bras Ginecol Obstet. 2018;40(6):347-353

    DOI 10.1055/s-0038-1660841

    Views1

    Abstract

    Objective

    The aim of this study was to assess the time trends and pattern of cervical cancer diagnosed in the period from 2001 to 2012 by means of an opportunistic screening program from two developed regions in Brazil.

    Methods

    An observational study analyzing 3,364 cancer records (n = 1,646 from Campinas and n = 1,718 from Curitiba region) available in hospital-based cancer registries was done. An additional 1,836 records of CIN3/AIS from the region of Campinas was analyzed. The statistical analysis assessed the pooled data and the data by region considering the year of diagnosis, age-group, cancer stage, and histologic type. The Cochran-Armitage trend test was applied and p-values < 0.05 were considered significant.

    Results

    The total annual cervical cancer registered from2001 to 2012 showed a slight drop (273-244), with an age average of 49.5 y, 13 years over the average for CIN3/AIS (36.8 y). A total of 20.6% of the diagnoses (1.6% under 25 y) were done out of the official screening age-range. The biennial rate of diagnoses by age group for the region of Campinas showed an increase trend for the age groups under 25 y (p = 0.007) and 25 to 44 y (p = 0.003). Stage III was the most recorded for both regions, with an annual average of 43%, without any trend modification. There was an increasing trend for stage I diagnoses in the region of Campinas (p = 0.033). The proportion of glandular histologic types registered had an increased trend over time (p = 0.002), higher for the region of Campinas (21.1% versus 12.5% for the region of Curitiba).

    Conclusion

    The number, pattern and trends of cervical cancer cases registered had mild and slow modifications and reflect the limited effectivity of the opportunistic screening program, even in developed places.

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    Cervical Cancer Registered in Two Developed Regions from Brazil: Upper Limit of Reachable Results from Opportunistic Screening
  • Original Article

    Regional and Socioeconomic Differences in the Coverage of the Papanicolau Test in Brazil: Data from the Brazilian Health Survey 2013

    Rev Bras Ginecol Obstet. 2017;39(9):480-487

    Summary

    Original Article

    Regional and Socioeconomic Differences in the Coverage of the Papanicolau Test in Brazil: Data from the Brazilian Health Survey 2013

    Rev Bras Ginecol Obstet. 2017;39(9):480-487

    DOI 10.1055/s-0037-1604481

    Views0

    Abstract

    Purpose

    To evaluate the coverage of the Papanicolaou test in Brazil and the associated factors.

    Methods

    Cross-sectional study based on data from the Brazilian Health Survey 2013 comprising the proportion of 25- to 64-year-old women who had undergone a Papanicolaou test within the previous 3 years, categorized by sociodemographic variables and access to healthcare services.

    Results

    The screening coverage in Brazil was of 79.4% (95% confidence interval [95%CI]: 78.4-80.3), showing significant differences between the different states of the country, with the highest rate in the state of Roraima (86.5; 95%CI: 83.5-89.4), and the lowestone in the state ofMaranhão (67.7; 95%CI: 61.3-74.0).Undergoing the test was significantlymore frequent amongmarriedwomen (83.6%; 95%CI: 82.4-84.8), those with higher educational levels (88.7%; 95%CI: 87.0-90.5), of white ethnicity (82.6%; 95%CI: 81.3-83.9) and who reside in urban areas (80.1%; 95%CI: 79.1-81.2). Those who had undergone the test more than three years prior to the survey and the ones who had never undergone it were associated with a lower level of education, being of black or brown ethnicity, single or divorced, and rural dwellers.

    Conclusions

    The coverage of cervical cancer screening in Brazil is below the recommended rate and presents regional and sociodemographic disparities.

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    Regional and Socioeconomic Differences in the Coverage of the Papanicolau Test in Brazil: Data from the Brazilian Health Survey 2013
  • Original Article

    Trends in the Prevalence of Live Macrosomic Newborns According to Gestational Age Strata, in Brazil, 2001-2010, and 2012-2014

    Rev Bras Ginecol Obstet. 2017;39(8):376-383

    Summary

    Original Article

    Trends in the Prevalence of Live Macrosomic Newborns According to Gestational Age Strata, in Brazil, 2001-2010, and 2012-2014

    Rev Bras Ginecol Obstet. 2017;39(8):376-383

    DOI 10.1055/s-0037-1604266

    Views2

    Abstract

    Purpose

    To describe the trends in the prevalence of macrosomia (birth weight ± 4,000 g) according to gestational age in Brazil in the periods of 2001-2010 and 2012-2014.

    Methods

    Ecological study with data from the Brazilian Live Birth Information System (SINASC, in the Portuguese acronym) regarding singleton live newborns born from 22 gestational weeks. The trends in Brazil as a whole and in each of its five regions were analyzed according to preterm (22-36 gestational weeks) and term (37-42 gestational weeks) strata. Annual Percent Changes (APCs) based on the Prais-Winsten method and their respective 95% confidence intervals (CIs) were used to verify statistically significant changes in 2001-2010.

    Results

    In Brazil, the prevalence of macrosomic births was of 5.3% (2001-2010) and 5.1% (2012-2014). The rates were systematically higher in the North and Northeast Regions both in the preterm and in term strata. In the preterm stratum, the North Region presented the highest variation in the prevalence of macrosomia (+137.5%) when comparing 2001 (0.8%) to 2010 (1.9%). In the term stratum, downward trends were observed in Brazil as a whole and in every region. The trends for 2012-2014 were more heterogeneous, with the prevalence systematically higher than that observed for 2001-2010. The APC in the preterm stratum (2001-2010) showed a statistically significant trend change in the North (APC: 15.4%; 95%CI: 0.6-32.3) and South (APC: 13.5%; 95%CI: 4.8-22.9) regions. In the term stratum, the change occurred only in the North region (APC:-1.5%; 95%CI: -2.5--0.5).

    Conclusion

    The prevalence of macrosomic births in Brazil was higher than 5.0%. Macrosomia has potentially negative health implications for both children and adults, and deserves close attention in the public health agenda in Brazil, as well as further support for investigation and intervention.

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    Trends in the Prevalence of Live Macrosomic Newborns According to Gestational Age Strata, in Brazil, 2001-2010, and 2012-2014
  • Original Article

    Prevalence of Human Papillomavirus Infection and Cervical Cancer Screening among Riverside Women of the Brazilian Amazon

    Rev Bras Ginecol Obstet. 2017;39(7):350-357

    Summary

    Original Article

    Prevalence of Human Papillomavirus Infection and Cervical Cancer Screening among Riverside Women of the Brazilian Amazon

    Rev Bras Ginecol Obstet. 2017;39(7):350-357

    DOI 10.1055/s-0037-1604027

    Views4

    Abstract

    Purpose

    The aim of this study was to evaluate the overall and type-specific prevalence of human papillomavirus (HPV) infection among females living in riverside communities in the state of Pará, in the Eastern Brazilian Amazon. These communities are inhabited by low-income people, and are accessible only by small boats. Cervical cytology and risk factors for HPV infection were also assessed.

    Methods

    Cervical samples from 353 women of selected communities were collected both for Papanicolau (Pap) test and HPV detection. Conventional polymerase chain reaction (PCR) and real-time PCR were used to assess the overall and type-specific prevalence of HPV-16 and HPV-18, the main oncogenic types worldwide. Epidemiological questionnaires were used for the assessment of the risk factors for HPV infection.

    Results

    The mean age of the participants was 37 years (standard deviation [SD] ± 13.7). Most were married or with a fixed sexual partner (79%), and had a low educational level (80%) and family monthly income (< U$ 250; 53%). Overall, HPV prevalence was 16.4% (n = 58), with 8 cases of HPV-16 (2.3%) and 5 of HPV-18 (1.4%). Almost 70% of the women surveyed had never undergone the Pap test. Abnormal cytology results were found in 27.5% (n = 97) of the samples, with higher rates of HPV infection according to the severity of the lesions (p = 0.026).

    Conclusions

    The infections by HPV-16 and HPV-18 were not predominant in our study, despite the high prevalence of overall HPV infection. Nevertheless, the oncogenic potential of these types and the low coverage of the Pap test among women from riverside communities demonstrate a potential risk for the development of cervical lesions and their progression to cervical cancer, since the access to these communities is difficult and, in most cases, these women do not have access to primary care and public health services.

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    Prevalence of Human Papillomavirus Infection and Cervical Cancer Screening among Riverside Women of the Brazilian Amazon

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