Agreement between self-reported pre-pregnancy weight and measured first-trimester weight in Brazilian women

被引：42

作者：

Bousquet Carrilho, Thais Rangel ^{[1
]}

Rasmussen, Kathleen M. ^{[2
]}

Farias, Dayana Rodrigues ^{[1
]}

Freitas Costa, Nathalia Cristina ^{[1
]}

Batalha, Monica Araujo ^{[1
]}

Reichenheim, Michael E. ^{[3
]}

Ohuma, Eric O. ^{[4
,5
]}

Hutcheon, Jennifer A. ^{[6
]}

Kac, Gilberto ^{[1
]}

机构：

[1] Univ Fed Rio de Janeiro, Josue de Castro Nutr Inst, Nutr Epidemiol Observ, Ave Carlos Chagas Filho 373 CCS,Bloco J,2 Andar, BR-21941902 Rio De Janeiro, RJ, Brazil

[2] Cornell Univ, Div Nutr Sci, 227 Savage Hall, Ithaca, NY 14850 USA

[3] Univ Estado Rio De Janeiro, Inst Social Med, Dept Epidemiol, Rua Sao Francisco Xavier 524,7 Andar,Bloco D, BR-20550013 Rio De Janeiro, RJ, Brazil

[4] London Sch Hyg & Trop Med, Maternal Adolescent Reprod & Child Hlth MARCH Ctr, Keppel St, London WC1E 7HT, England

[5] Univ Oxford, Nuffield Dept Med, Ctr Trop Med & Global Hlth, Peter Medawar Bldg Pathogen Res PMB, Oxford OX1 3SY, England

[6] Univ British Columbia, Dept Obstet & Gynaecol, Fac Med, Suite 930,1125 Howe St, Vancouver, BC V6Z 2K8, Canada

来源：

BMC PREGNANCY AND CHILDBIRTH | 2020年 / 20卷 / 01期

基金：

巴西圣保罗研究基金会;

关键词：

Weight; Self-report; First trimester; Pregnancy; Gestational weight gain; Body mass index; Agreement; IMPLAUSIBLE VALUES; GESTATIONAL-AGE; PREGNANCY; VALIDITY; HEIGHT; GAIN; COEFFICIENT; ACCURACY; OUTLIERS; 1ST;

D O I：

10.1186/s12884-020-03354-4

中图分类号：

R71 [妇产科学];

学科分类号：

100211 ;

摘要：

BackgroundSelf-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.MethodsData 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 30-45days 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.ResultsThe mean of the differences between self-reported and measured weights was <2kg during the three intervals examined for BMCNC (1.42, 1.39 and 1.56kg) and about 1kg for SISVAN (1.0, 1.1 and 1.2kg). 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 2kg 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 30-45days, 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.

引用

页数：13

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