Tatiana Assunção Zaccara
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Tatiana Assunção Zaccara has a total of 29 co-authors. Here are the top co-authors by number of shared publications:
- Rossana Pulcineli Vieira Francisco
Disciplina de Obstetricia, Departamento de Obstetricia e Ginecologia, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, Brazil
6 shared publications - Rafaela Alkmin da Costa
Department of Obstetrics and Gynecology, Faculty of Medicine, University of São Paulo, São Paulo, Brazil
4 shared publications - Cristiane de Freitas Paganoti
Divisão de Obstetricia, Instituto Central, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
3 shared publications - Fernanda Cristina Ferreira Mikami
Divisão de Obstetricia, Instituto Central, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
3 shared publications - Ana Paula Veiga de Oliveira
Disciplina de Obstetrícia, Departamento de Obstetrícia e Ginecologia, Faculdade de Medicina da Universidade de São Paulo (FMUSP), Universidade de São Paulo, São Paulo, Brazil
2 shared publications - Marcela Del Carlo Bernardi
Divisão de Obstetricia, Instituto Central, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
2 shared publications
Latest Publications
- Open Access
- 4 March 2026
- Published by Federação das Associações de Ginecologia e Obstetrícia in Revista Brasileira de Ginecologia e Obstetrícia
- Vol. 48
Development of a Brazilian Portuguese instrument to assess knowledge, attitudes, and practices of pregnant women with diabetes at a Brazilian center
To develop and test an instrument in Brazilian Portuguese to evaluate KAP regarding GDM. We developed an instrument with 22 items (10 items for practice, 4 for knowledge and 8 for attitude), which was tested in a population of pregnant women (24 – 28 weeks) with GDM. We performed an Exploratory Factor Analysis to evaluate the items included in the instrument, the covariance among the domains evaluated by the instrument, and the robustness of the instrument. One hundred seventy-five participants were included in this study (mean gestational age: 25.4±7.1 weeks). The majority of them did not present adequate KAP regarding diabetes. The average knowledge score was 0.84±1.02 points; the attitude score was 32.46±2.94; and the practice score was 4.65±1.65. The model with the best robustness to evaluate KAP was composed of 3 items for knowledge, 6 for attitude, and 5 for practice. The levels of KAP regarding diabetes among Brazilian pregnant women are low. The moderate association between knowledge and practice underscores the need for targeted educational interventions within prenatal care. Implementing a specific Brazilian Portuguese instrument to evaluate KAP among this population can bring evidence regarding the dimension of the problem in the country.
- 4 March 2026
- Published by Federação das Associações de Ginecologia e Obstetrícia in Revista Brasileira de Ginecologia e Obstetrícia
- Vol. 48
Open AccessDevelopment of a Brazilian Portuguese instrument to assess knowledge, attitudes, and practices of pregnant women with diabetes at a Brazilian center
To develop and test an instrument in Brazilian Portuguese to evaluate KAP regarding GDM. We developed an instrument with 22 items (10 items for practice, 4 for knowledge and 8 for attitude), which was tested in a population of pregnant women (24 – 28 weeks) with GDM. We performed an Exploratory Factor Analysis to evaluate the items included in the instrument, the covariance among the domains evaluated by the instrument, and the robustness of the instrument. One hundred seventy-five participants were included in this study (mean gestational age: 25.4±7.1 weeks). The majority of them did not present adequate KAP regarding diabetes. The average knowledge score was 0.84±1.02 points; the attitude score was 32.46±2.94; and the practice score was 4.65±1.65. The model with the best robustness to evaluate KAP was composed of 3 items for knowledge, 6 for attitude, and 5 for practice. The levels of KAP regarding diabetes among Brazilian pregnant women are low. The moderate association between knowledge and practice underscores the need for targeted educational interventions within prenatal care. Implementing a specific Brazilian Portuguese instrument to evaluate KAP among this population can bring evidence regarding the dimension of the problem in the country.
- Open Access
- 27 January 2025
- Published by Universidade de São Paulo. Agência de Bibliotecas e Coleções Digitais in Revista de Medicina
- Vol. 104 (esp.)
Fatores de risco e principais indicações para cesárea em pacientes gestantes com Diabetes Melito Gestacional
Gestational Diabetes Mellitus (GDM) is a common pregnancy complication and is linked to high cesarean rates, particularly in Brazil, where national data on the subject is limited. This study analyzed risk factors and primary indications for c-sections among GDM-affected pregnancies. It included a retrospective cohort of women receiving prenatal care at a tertiary hospital from January 2012 to March 2020, totaling 866 cases that met criteria: diagnosed GDM, pregnancies beyond 20 weeks, and delivery at this hospital. The cohort was divided into VAGINAL and CESAREAN groups, with statistical comparisons made between them. Of the 866 cases, 323 (37.3%) were vaginal deliveries, and 545 (62.7%) were c-sections. Primary indications for c-section included prior uterine surgeries (20.07%), iterative c-section (18.78%), fetal distress (9.76% intrapartum; 8.84% antepartum), non-cephalic presentation (7.37%), and functional dystocia (7.0%). Univariate analysis identified several factors associated with higher c-section risk, such as advanced maternal age (p<0.001), higher BMI (p=0.016), previous c-sections (p<0.001), hypertension (p=0.024), high glucose levels during pregnancy (p=0.031 for early fasting plasma glucose; p=0.002 for 1h and p<0.001 for 2h after glucose overload), nulliparity (p=0.012), multiple gestation (p<0.001), preeclampsia (p=0.012), and placenta previa (p=0.010). Conversely, spontaneous labor onset (p<0.001) and preterm labor (p=0.001) were associated with lower c-section rates. Multivariate analysis confirmed that age (OR 1,048), nulliparity (OR 2.892), previous c-section (OR 14.49), and spontaneous labor onset (OR 0.199) were independent predictors of c-section. The findings emphasize that prior uterine scars significantly increase c-section risk. In contrast, spontaneous labor onset reduces this risk by almost 80%.
- 27 January 2025
- Published by Universidade de São Paulo. Agência de Bibliotecas e Coleções Digitais in Revista de Medicina
- Vol. 104 (esp.)
Open AccessFatores de risco e principais indicações para cesárea em pacientes gestantes com Diabetes Melito Gestacional
Gestational Diabetes Mellitus (GDM) is a common pregnancy complication and is linked to high cesarean rates, particularly in Brazil, where national data on the subject is limited. This study analyzed risk factors and primary indications for c-sections among GDM-affected pregnancies. It included a retrospective cohort of women receiving prenatal care at a tertiary hospital from January 2012 to March 2020, totaling 866 cases that met criteria: diagnosed GDM, pregnancies beyond 20 weeks, and delivery at this hospital. The cohort was divided into VAGINAL and CESAREAN groups, with statistical comparisons made between them. Of the 866 cases, 323 (37.3%) were vaginal deliveries, and 545 (62.7%) were c-sections. Primary indications for c-section included prior uterine surgeries (20.07%), iterative c-section (18.78%), fetal distress (9.76% intrapartum; 8.84% antepartum), non-cephalic presentation (7.37%), and functional dystocia (7.0%). Univariate analysis identified several factors associated with higher c-section risk, such as advanced maternal age (p<0.001), higher BMI (p=0.016), previous c-sections (p<0.001), hypertension (p=0.024), high glucose levels during pregnancy (p=0.031 for early fasting plasma glucose; p=0.002 for 1h and p<0.001 for 2h after glucose overload), nulliparity (p=0.012), multiple gestation (p<0.001), preeclampsia (p=0.012), and placenta previa (p=0.010). Conversely, spontaneous labor onset (p<0.001) and preterm labor (p=0.001) were associated with lower c-section rates. Multivariate analysis confirmed that age (OR 1,048), nulliparity (OR 2.892), previous c-section (OR 14.49), and spontaneous labor onset (OR 0.199) were independent predictors of c-section. The findings emphasize that prior uterine scars significantly increase c-section risk. In contrast, spontaneous labor onset reduces this risk by almost 80%.
- Open Access
- 2 June 2023
- Published by Springer Nature in BMC Pregnancy and Childbirth
- Vol. 23 (1) , 1-6
Predicting insulin use among women with gestational diabetes diagnosed in oral glucose tolerance test
Background: Gestational diabetes mellitus (GDM) is one of the most common complications affecting pregnant women. While most women will achieve adequate glycemic levels with diet and exercise, some will require pharmacological treatment to reach and maintain glucose levels between the desired thresholds. Identifying these patients early in pregnancy could help direct resources and interventions. Methods: This retrospective cohort of women with GDM diagnosed with an abnormal 75g-OGTT presents data from 869 patients (724 in the diet group and 145 in the insulin group). Univariate logistic regression was used to compare the groups, and multivariable logistic regression was used to identify independent factors associated with the need for insulin. A log-linear function was used to estimate the probability of requiring pharmacological treatment. Results: Women in the insulin group had higher pre-pregnancy BMI index (29.8 vs 27.8 kg/m2, odds ratio [OR] 1.06, 95% confidence interval [CI] 1.03–1.09), more frequent history of previous GDM (19.4% vs. 7.8%, OR 2.84, 95% CI 1.59–5.05), were more likely to have chronic hypertension (31.7% vs. 23.2%, OR 1.54, 95% CI 1.04–2.27), and had higher glucose levels at all three OGTT points. Multivariable logistic regression final model included age, BMI, previous GDM status, and the three OGTT values as predictors of insulin requirement. Conclusions: We can use regularly collected data from patients (age, BMI, previous GDM status, and the three OGTT values) to calculate the risk of a woman with GDM diagnosed in OGTT needing insulin. Identifying patients with a greater risk of requiring pharmacological treatment could help healthcare services to better allocate resources and offer closer follow-up to high-risk patients.
- 2 June 2023
- Published by Springer Nature in BMC Pregnancy and Childbirth
- Vol. 23 (1) , 1-6
Open AccessPredicting insulin use among women with gestational diabetes diagnosed in oral glucose tolerance test
Background: Gestational diabetes mellitus (GDM) is one of the most common complications affecting pregnant women. While most women will achieve adequate glycemic levels with diet and exercise, some will require pharmacological treatment to reach and maintain glucose levels between the desired thresholds. Identifying these patients early in pregnancy could help direct resources and interventions. Methods: This retrospective cohort of women with GDM diagnosed with an abnormal 75g-OGTT presents data from 869 patients (724 in the diet group and 145 in the insulin group). Univariate logistic regression was used to compare the groups, and multivariable logistic regression was used to identify independent factors associated with the need for insulin. A log-linear function was used to estimate the probability of requiring pharmacological treatment. Results: Women in the insulin group had higher pre-pregnancy BMI index (29.8 vs 27.8 kg/m2, odds ratio [OR] 1.06, 95% confidence interval [CI] 1.03–1.09), more frequent history of previous GDM (19.4% vs. 7.8%, OR 2.84, 95% CI 1.59–5.05), were more likely to have chronic hypertension (31.7% vs. 23.2%, OR 1.54, 95% CI 1.04–2.27), and had higher glucose levels at all three OGTT points. Multivariable logistic regression final model included age, BMI, previous GDM status, and the three OGTT values as predictors of insulin requirement. Conclusions: We can use regularly collected data from patients (age, BMI, previous GDM status, and the three OGTT values) to calculate the risk of a woman with GDM diagnosed in OGTT needing insulin. Identifying patients with a greater risk of requiring pharmacological treatment could help healthcare services to better allocate resources and offer closer follow-up to high-risk patients.
- Open Access
- 26 November 2022
- Published by MDPI AG in International Journal of Environmental Research and Public Health
- Vol. 19 (23) , 15735
Post-Viral Fatigue Following SARS-CoV-2 Infection during Pregnancy: A Longitudinal Comparative Study
Studies reported post-COVID-19 fatigue in the general population, but not among pregnant women. Our objectives were to determine prevalence, duration, and risk factors of post-viral fatigue among pregnant women with SARS-CoV-2. This study involved 588 pregnant women with SARS-CoV-2 during pregnancy or delivery in Brazil. Three groups were investigated: G1 (n = 259, symptomatic infection during pregnancy); G2 (n = 131, positive serology at delivery); G3 (n = 198, negative serology at delivery). We applied questionnaires investigating fatigue at determined timepoints after infection for G1, and after delivery for all groups; fatigue prevalence was then determined. Cox regression was used to estimate hazard ratio (HR) and 95% CI of the risk of remaining with fatigue in G1. Overall fatigue prevalence in G1 at six weeks, three months and six months were 40.6%, 33.6%, and 27.8%, respectively. Cumulative risk of remaining with fatigue increased over time, with HR of 1.69 (95% CI: 0.89–3.20) and 2.43 (95% CI: 1.49–3.95) for women with moderate and severe symptoms, respectively. Multivariate analysis showed cough and myalgia as independent risk factors in G1. Fatigue prevalence was significantly higher in G1 compared to G2 and G3. Post-viral fatigue prevalence is higher in women infected during pregnancy; fatigue’s risk and duration increased with the severity of infection.
- 26 November 2022
- Published by MDPI AG in International Journal of Environmental Research and Public Health
- Vol. 19 (23) , 15735
Open AccessPost-Viral Fatigue Following SARS-CoV-2 Infection during Pregnancy: A Longitudinal Comparative Study
Studies reported post-COVID-19 fatigue in the general population, but not among pregnant women. Our objectives were to determine prevalence, duration, and risk factors of post-viral fatigue among pregnant women with SARS-CoV-2. This study involved 588 pregnant women with SARS-CoV-2 during pregnancy or delivery in Brazil. Three groups were investigated: G1 (n = 259, symptomatic infection during pregnancy); G2 (n = 131, positive serology at delivery); G3 (n = 198, negative serology at delivery). We applied questionnaires investigating fatigue at determined timepoints after infection for G1, and after delivery for all groups; fatigue prevalence was then determined. Cox regression was used to estimate hazard ratio (HR) and 95% CI of the risk of remaining with fatigue in G1. Overall fatigue prevalence in G1 at six weeks, three months and six months were 40.6%, 33.6%, and 27.8%, respectively. Cumulative risk of remaining with fatigue increased over time, with HR of 1.69 (95% CI: 0.89–3.20) and 2.43 (95% CI: 1.49–3.95) for women with moderate and severe symptoms, respectively. Multivariate analysis showed cough and myalgia as independent risk factors in G1. Fatigue prevalence was significantly higher in G1 compared to G2 and G3. Post-viral fatigue prevalence is higher in women infected during pregnancy; fatigue’s risk and duration increased with the severity of infection.
- Open Access
- 22 October 2022
- Published by MDPI AG in International Journal of Environmental Research and Public Health
- Vol. 19 (21) , 13719
Early vs. Late Gestational Diabetes: Comparison between Two Groups Diagnosed by Abnormal Initial Fasting Plasma Glucose or Mid-Pregnancy Oral Glucose Tolerance Test
Gestational diabetes mellitus (GDM) is one of the most common complications in pregnancy. It may be diagnosed using a fasting plasma glucose (FPG) early in pregnancy (eGDM) or a 75-g oral glucose tolerance test (OGTT) (late GDM). This retrospective cohort of women with GDM presents data from 1891 patients (1004 in the eGDM and 887 in the late GDM group). Student’s t-test, chi-squared or Fisher’s exact test and the Bonferroni test for post hoc analysis were used to compare the groups. Women with eGDM had higher pre-pregnancy BMI, more frequent family history of DM, more frequent history of previous GDM, and were more likely to have chronic hypertension. They were more likely to deliver by cesarean section and to present an abnormal puerperal OGTT. Even though they received earlier treatment and required insulin more frequently, there was no difference in neonatal outcomes. Diagnosing and treating GDM is necessary to reduce complications and adverse outcomes, but it is still a challenge. We believe that women with eGDM should be treated and closely monitored, even though this may increase healthcare-related costs.
- 22 October 2022
- Published by MDPI AG in International Journal of Environmental Research and Public Health
- Vol. 19 (21) , 13719
Open AccessEarly vs. Late Gestational Diabetes: Comparison between Two Groups Diagnosed by Abnormal Initial Fasting Plasma Glucose or Mid-Pregnancy Oral Glucose Tolerance Test
Gestational diabetes mellitus (GDM) is one of the most common complications in pregnancy. It may be diagnosed using a fasting plasma glucose (FPG) early in pregnancy (eGDM) or a 75-g oral glucose tolerance test (OGTT) (late GDM). This retrospective cohort of women with GDM presents data from 1891 patients (1004 in the eGDM and 887 in the late GDM group). Student’s t-test, chi-squared or Fisher’s exact test and the Bonferroni test for post hoc analysis were used to compare the groups. Women with eGDM had higher pre-pregnancy BMI, more frequent family history of DM, more frequent history of previous GDM, and were more likely to have chronic hypertension. They were more likely to deliver by cesarean section and to present an abnormal puerperal OGTT. Even though they received earlier treatment and required insulin more frequently, there was no difference in neonatal outcomes. Diagnosing and treating GDM is necessary to reduce complications and adverse outcomes, but it is still a challenge. We believe that women with eGDM should be treated and closely monitored, even though this may increase healthcare-related costs.
- Open Access
- 3 May 2022
- Published by Springer Nature in BMC Pregnancy and Childbirth
- Vol. 22 (1) , 1-8
WHO criteria for diabetes in pregnancy: a retrospective cohort
Background: Recognizing that hyperglycemia in pregnancy can impact both individually a patient’s health and collectively the healthcare system and that different levels of hyperglycemia incur different consequences, we aimed to evaluate the differences and similarities between patients who met the diagnostic criteria for gestational diabetes mellitus (GDM) or diabetes in pregnancy (DIP) according to the World Health Organization diagnostic criteria based on the 75 g oral glucose tolerance test (OGTT). Methods: This retrospective study included a cohort of 1064 women followed-up at the Gestational Diabetes Unit of Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo (Sao Paulo, Brazil). Patients were classified into GDM and DIP groups, according to their OGTT results. Their electronic charts were reviewed to obtain clinical and laboratory data for all participants. Results: Women in the DIP group had a higher pre-pregnancy body mass index (30.5 vs 28.1 kg/m2, odds ratio [OR] 1.07, 95% confidence interval [CI] 1.02–1.11), more frequently experienced GDM in a previous pregnancy (25% vs. 11%, OR 2.71, 95% CI 1.17–6.27), and were more likely to have chronic hypertension (43.1% vs. 23.5%, OR 2.46, 95% CI 1.47–4.11), a current twin pregnancy (10.8% vs. 2.9%, OR 4.04, 95% CI 1.70–9.61), or require insulin (46.1% vs. 14.3%, OR 5.14, 95% CI 3.06–8.65) than those in the GDM group. Patients in the DIP group also had a higher frequency of large-for-gestational-age infants (12.3% vs. 5.1%, OR 2.78, 95% CI 1.23–6.27) and abnormal postpartum OGTT (45.9% vs. 12.6%, OR 5.91, 95% CI 2.93–11.90) than those in the GDM group. Nevertheless, in more than half of the DIP patients, glucose levels returned to normal after birth. Conclusions: Diabetes in pregnancy is associated with an increased risk of adverse perinatal outcomes but does not equate to a diagnosis of diabetes post-pregnancy. It is necessary to identify and monitor these women more closely during and after pregnancy. Keeping patients with hyperglycemia in pregnancy engaged in healthcare is essential for accurate diagnosis and prevention of complications related to abnormal glucose metabolism.
- 3 May 2022
- Published by Springer Nature in BMC Pregnancy and Childbirth
- Vol. 22 (1) , 1-8
Open AccessWHO criteria for diabetes in pregnancy: a retrospective cohort
Background: Recognizing that hyperglycemia in pregnancy can impact both individually a patient’s health and collectively the healthcare system and that different levels of hyperglycemia incur different consequences, we aimed to evaluate the differences and similarities between patients who met the diagnostic criteria for gestational diabetes mellitus (GDM) or diabetes in pregnancy (DIP) according to the World Health Organization diagnostic criteria based on the 75 g oral glucose tolerance test (OGTT). Methods: This retrospective study included a cohort of 1064 women followed-up at the Gestational Diabetes Unit of Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo (Sao Paulo, Brazil). Patients were classified into GDM and DIP groups, according to their OGTT results. Their electronic charts were reviewed to obtain clinical and laboratory data for all participants. Results: Women in the DIP group had a higher pre-pregnancy body mass index (30.5 vs 28.1 kg/m2, odds ratio [OR] 1.07, 95% confidence interval [CI] 1.02–1.11), more frequently experienced GDM in a previous pregnancy (25% vs. 11%, OR 2.71, 95% CI 1.17–6.27), and were more likely to have chronic hypertension (43.1% vs. 23.5%, OR 2.46, 95% CI 1.47–4.11), a current twin pregnancy (10.8% vs. 2.9%, OR 4.04, 95% CI 1.70–9.61), or require insulin (46.1% vs. 14.3%, OR 5.14, 95% CI 3.06–8.65) than those in the GDM group. Patients in the DIP group also had a higher frequency of large-for-gestational-age infants (12.3% vs. 5.1%, OR 2.78, 95% CI 1.23–6.27) and abnormal postpartum OGTT (45.9% vs. 12.6%, OR 5.91, 95% CI 2.93–11.90) than those in the GDM group. Nevertheless, in more than half of the DIP patients, glucose levels returned to normal after birth. Conclusions: Diabetes in pregnancy is associated with an increased risk of adverse perinatal outcomes but does not equate to a diagnosis of diabetes post-pregnancy. It is necessary to identify and monitor these women more closely during and after pregnancy. Keeping patients with hyperglycemia in pregnancy engaged in healthcare is essential for accurate diagnosis and prevention of complications related to abnormal glucose metabolism.