Agreement between self-reported pre-pregnancy weight and measured first-trimester weight in Brazilian women
Abstract Background Self-reported pre-pregnancy weight and weight measured in the first trimester are both used to estimate pre-pregnancy body mass index (BMI) and gestational weight gain (GWG) but there is limited information on how they compare, especially in low- and middle-income countries, wher...
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| Format: | Article |
| Language: | English |
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BMC
2020-11-01
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| Series: | BMC Pregnancy and Childbirth |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s12884-020-03354-4 |
| _version_ | 1830132685706625024 |
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| author | Thaís Rangel Bousquet Carrilho Kathleen M. Rasmussen Dayana Rodrigues Farias Nathalia Cristina Freitas Costa Mônica Araújo Batalha Michael E. Reichenheim Eric O. Ohuma Jennifer A. Hutcheon Gilberto Kac Brazilian Maternal and Child Nutrition Consortium |
| author_facet | Thaís Rangel Bousquet Carrilho Kathleen M. Rasmussen Dayana Rodrigues Farias Nathalia Cristina Freitas Costa Mônica Araújo Batalha Michael E. Reichenheim Eric O. Ohuma Jennifer A. Hutcheon Gilberto Kac Brazilian Maternal and Child Nutrition Consortium |
| author_sort | Thaís Rangel Bousquet Carrilho |
| collection | DOAJ |
| description | Abstract Background Self-reported pre-pregnancy weight and weight measured in the first trimester are both used to estimate pre-pregnancy body mass index (BMI) and gestational weight gain (GWG) but there is limited information on how they compare, especially in low- and middle-income countries, where access to a weight scale can be limited. Thus, the main goal of this study was to evaluate the agreement between self-reported pre-pregnancy weight and weight measured during the first trimester of pregnancy among Brazilian women so as to assess whether self-reported pre-pregnancy weight is reliable and can be used for calculation of BMI and GWG. Methods Data from the Brazilian Maternal and Child Nutrition Consortium (BMCNC, n = 5563) and the National Food and Nutritional Surveillance System (SISVAN, n = 393,095) were used to evaluate the agreement between self-reported pre-pregnancy weight and weights measured in three overlapping intervals (30–94, 30–60 and 30–45 days of pregnancy) and their impact in BMI classification. We calculated intraclass correlation and Lin’s concordance coefficients, constructed Bland and Altman plots, and determined Kappa coefficient for the categories of BMI. Results The mean of the differences between self-reported and measured weights was < 2 kg during the three intervals examined for BMCNC (1.42, 1.39 and 1.56 kg) and about 1 kg for SISVAN (1.0, 1.1 and 1.2 kg). Intraclass correlation and Lin’s coefficient were > 0.90 for both datasets in all time intervals. Bland and Altman plots showed that the majority of the difference laid in the ±2 kg interval and that the differences did not vary according to measured first-trimester BMI. Kappa coefficient values were > 0.80 for both datasets at all intervals. Using self-reported pre-pregnancy or measured weight would change, in total, the classification of BMI in 15.9, 13.5, and 12.2% of women in the BMCNC and 12.1, 10.7, and 10.2% in the SISVAN, at 30–94, 30–60 and 30–45 days, respectively. Conclusion In Brazil, self-reported pre-pregnancy weight can be used for calculation of BMI and GWG when an early measurement of weight during pregnancy is not available. These results are especially important in a country where the majority of woman do not initiate prenatal care early in pregnancy. |
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| id | doaj.art-347fc2c3eff1407896ff9dc6abf4ec21 |
| institution | Directory Open Access Journal |
| issn | 1471-2393 |
| language | English |
| last_indexed | 2024-12-17T06:40:02Z |
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| series | BMC Pregnancy and Childbirth |
| spelling | doaj.art-347fc2c3eff1407896ff9dc6abf4ec212022-12-21T21:59:53ZengBMCBMC Pregnancy and Childbirth1471-23932020-11-0120111310.1186/s12884-020-03354-4Agreement between self-reported pre-pregnancy weight and measured first-trimester weight in Brazilian womenThaís Rangel Bousquet Carrilho0Kathleen M. Rasmussen1Dayana Rodrigues Farias2Nathalia Cristina Freitas Costa3Mônica Araújo Batalha4Michael E. Reichenheim5Eric O. Ohuma6Jennifer A. Hutcheon7Gilberto Kac8Brazilian Maternal and Child Nutrition ConsortiumNutritional Epidemiology Observatory, Josué de Castro Nutrition Institute, Federal University of Rio de Janeiro. Avenida Carlos Chagas Filho 373/CCSDivision of Nutritional Sciences, Cornell UniversityNutritional Epidemiology Observatory, Josué de Castro Nutrition Institute, Federal University of Rio de Janeiro. Avenida Carlos Chagas Filho 373/CCSNutritional Epidemiology Observatory, Josué de Castro Nutrition Institute, Federal University of Rio de Janeiro. Avenida Carlos Chagas Filho 373/CCSNutritional Epidemiology Observatory, Josué de Castro Nutrition Institute, Federal University of Rio de Janeiro. Avenida Carlos Chagas Filho 373/CCSDepartment of Epidemiology, Institute of Social Medicine, Rio de Janeiro State UniversityMaternal, Adolescent, Reproductive & Child Health (MARCH) Centre, London School of Hygiene & Tropical MedicineDepartment of Obstetrics and Gynaecology, University of British Columbia, Faculty of MedicineNutritional Epidemiology Observatory, Josué de Castro Nutrition Institute, Federal University of Rio de Janeiro. Avenida Carlos Chagas Filho 373/CCSAbstract Background Self-reported pre-pregnancy weight and weight measured in the first trimester are both used to estimate pre-pregnancy body mass index (BMI) and gestational weight gain (GWG) but there is limited information on how they compare, especially in low- and middle-income countries, where access to a weight scale can be limited. Thus, the main goal of this study was to evaluate the agreement between self-reported pre-pregnancy weight and weight measured during the first trimester of pregnancy among Brazilian women so as to assess whether self-reported pre-pregnancy weight is reliable and can be used for calculation of BMI and GWG. Methods Data from the Brazilian Maternal and Child Nutrition Consortium (BMCNC, n = 5563) and the National Food and Nutritional Surveillance System (SISVAN, n = 393,095) were used to evaluate the agreement between self-reported pre-pregnancy weight and weights measured in three overlapping intervals (30–94, 30–60 and 30–45 days of pregnancy) and their impact in BMI classification. We calculated intraclass correlation and Lin’s concordance coefficients, constructed Bland and Altman plots, and determined Kappa coefficient for the categories of BMI. Results The mean of the differences between self-reported and measured weights was < 2 kg during the three intervals examined for BMCNC (1.42, 1.39 and 1.56 kg) and about 1 kg for SISVAN (1.0, 1.1 and 1.2 kg). Intraclass correlation and Lin’s coefficient were > 0.90 for both datasets in all time intervals. Bland and Altman plots showed that the majority of the difference laid in the ±2 kg interval and that the differences did not vary according to measured first-trimester BMI. Kappa coefficient values were > 0.80 for both datasets at all intervals. Using self-reported pre-pregnancy or measured weight would change, in total, the classification of BMI in 15.9, 13.5, and 12.2% of women in the BMCNC and 12.1, 10.7, and 10.2% in the SISVAN, at 30–94, 30–60 and 30–45 days, respectively. Conclusion In Brazil, self-reported pre-pregnancy weight can be used for calculation of BMI and GWG when an early measurement of weight during pregnancy is not available. These results are especially important in a country where the majority of woman do not initiate prenatal care early in pregnancy.http://link.springer.com/article/10.1186/s12884-020-03354-4WeightSelf-reportFirst trimesterPregnancyGestational weight gainBody mass index |
| spellingShingle | Thaís Rangel Bousquet Carrilho Kathleen M. Rasmussen Dayana Rodrigues Farias Nathalia Cristina Freitas Costa Mônica Araújo Batalha Michael E. Reichenheim Eric O. Ohuma Jennifer A. Hutcheon Gilberto Kac Brazilian Maternal and Child Nutrition Consortium Agreement between self-reported pre-pregnancy weight and measured first-trimester weight in Brazilian women BMC Pregnancy and Childbirth Weight Self-report First trimester Pregnancy Gestational weight gain Body mass index |
| title | Agreement between self-reported pre-pregnancy weight and measured first-trimester weight in Brazilian women |
| title_full | Agreement between self-reported pre-pregnancy weight and measured first-trimester weight in Brazilian women |
| title_fullStr | Agreement between self-reported pre-pregnancy weight and measured first-trimester weight in Brazilian women |
| title_full_unstemmed | Agreement between self-reported pre-pregnancy weight and measured first-trimester weight in Brazilian women |
| title_short | Agreement between self-reported pre-pregnancy weight and measured first-trimester weight in Brazilian women |
| title_sort | agreement between self reported pre pregnancy weight and measured first trimester weight in brazilian women |
| topic | Weight Self-report First trimester Pregnancy Gestational weight gain Body mass index |
| url | http://link.springer.com/article/10.1186/s12884-020-03354-4 |
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