{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Sharma AJ"],"funding":["NCCDPHP CDC HHS","National Center for Chronic Disease Prevention and Health Promotion","Intramural CDC HHS"],"pagination":["1242-1253"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC8924792"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["25(8)"],"pubmed_abstract":["<h4>Objectives</h4>Prepregnancy body mass index (BMI) and gestational weight gain (GWG) are known determinants of maternal and child health; calculating both requires an accurate measure of prepregnancy weight. We compared self-reported prepregnancy weight to measured weights to assess reporting bias by maternal and clinical characteristics.<h4>Methods</h4>We conducted a retrospective cohort study among pregnant women using electronic health records (EHR) data from Kaiser Permanente Northwest, a non-profit integrated health care system in Oregon and southwest Washington State. We identified women age ≥ 18 years who were pregnant between 2000 and 2010 with self-reported prepregnancy weight, ≥ 2 measured weights between ≤ 365-days-prior-to and ≤ 42-days-after conception, and measured height in their EHR. We compared absolute and relative difference between self-reported weight and two \"gold-standards\": (1) weight measured closest to conception, and (2) usual weight (mean of weights measured 6-months-prior-to and ≤ 42-days-after conception). Generalized-estimating equations were used to assess predictors of misreport controlling for covariates, which were obtained from the EHR or linkage to birth certificate.<h4>Results</h4>Among the 16,227 included pregnancies, close agreement (± 1 kg or ≤ 2%) between self-reported and closest-measured weight was 44% and 59%, respectively. Overall, self-reported weight averaged 1.3 kg (SD 3.8) less than measured weight. Underreporting was higher among women with elevated BMI category, late prenatal care entry, and pregnancy outcome other than live/stillbirth (p < .05). Using self-reported weight, BMI was correctly classified for 91% of pregnancies, but ranged from 70 to 98% among those with underweight or obesity, respectively. Results were similar using usual weight as gold standard. CONCLUSIONS FOR PRACTICE: Accurate measure of prepregnancy weight is essential for clinical guidance and surveillance efforts that monitor maternal health and evaluate public-health programs. Identification of characteristics associated with misreport of self-reported weight can inform understanding of bias when assessing the influence of prepregnancy BMI or GWG on health outcomes."],"journal":["Maternal and child health journal"],"pubmed_title":["Bias in Self-reported Prepregnancy Weight Across Maternal and Clinical Characteristics."],"pmcid":["PMC8924792"],"funding_grant_id":["CC999999","Contract # CDC 200-2016-M-91914"],"pubmed_authors":["Callaghan WM","Sharma AJ","Dandamudi P","Stoneburner AB","Bulkley JE","Leo M","Vesco KK"],"additional_accession":[]},"is_claimable":false,"name":"Bias in Self-reported Prepregnancy Weight Across Maternal and Clinical Characteristics.","description":"<h4>Objectives</h4>Prepregnancy body mass index (BMI) and gestational weight gain (GWG) are known determinants of maternal and child health; calculating both requires an accurate measure of prepregnancy weight. We compared self-reported prepregnancy weight to measured weights to assess reporting bias by maternal and clinical characteristics.<h4>Methods</h4>We conducted a retrospective cohort study among pregnant women using electronic health records (EHR) data from Kaiser Permanente Northwest, a non-profit integrated health care system in Oregon and southwest Washington State. We identified women age ≥ 18 years who were pregnant between 2000 and 2010 with self-reported prepregnancy weight, ≥ 2 measured weights between ≤ 365-days-prior-to and ≤ 42-days-after conception, and measured height in their EHR. We compared absolute and relative difference between self-reported weight and two \"gold-standards\": (1) weight measured closest to conception, and (2) usual weight (mean of weights measured 6-months-prior-to and ≤ 42-days-after conception). Generalized-estimating equations were used to assess predictors of misreport controlling for covariates, which were obtained from the EHR or linkage to birth certificate.<h4>Results</h4>Among the 16,227 included pregnancies, close agreement (± 1 kg or ≤ 2%) between self-reported and closest-measured weight was 44% and 59%, respectively. Overall, self-reported weight averaged 1.3 kg (SD 3.8) less than measured weight. Underreporting was higher among women with elevated BMI category, late prenatal care entry, and pregnancy outcome other than live/stillbirth (p < .05). Using self-reported weight, BMI was correctly classified for 91% of pregnancies, but ranged from 70 to 98% among those with underweight or obesity, respectively. Results were similar using usual weight as gold standard. CONCLUSIONS FOR PRACTICE: Accurate measure of prepregnancy weight is essential for clinical guidance and surveillance efforts that monitor maternal health and evaluate public-health programs. Identification of characteristics associated with misreport of self-reported weight can inform understanding of bias when assessing the influence of prepregnancy BMI or GWG on health outcomes.","dates":{"release":"2021-01-01T00:00:00Z","publication":"2021 Aug","modification":"2025-04-05T16:07:19.452Z","creation":"2025-04-05T16:07:19.452Z"},"accession":"S-EPMC8924792","cross_references":{"pubmed":["33929655"],"doi":["10.1007/s10995-021-03149-9"]}}