Amissah Emma Ayorkor, Kancherla Vijaya, Ko Yi-An, Li Ruowei
1 Rollins School of Public Health, Emory University, Atlanta, GA, USA.
2 Division of Nutrition, Physical Activity and Obesity, Centers for Disease Control and Prevention, Atlanta, GA, USA.
J Hum Lact. 2017 May;33(2):390-400. doi: 10.1177/0890334417691506. Epub 2017 Mar 23.
Breastfeeding duration is an important indicator commonly measured in maternal and child health and nutrition research. Maternal short-term recall for both initiation and duration of breastfeeding has been shown to be valid; however, validity of long-term recall is not well understood. Research aim: This study aims to assess the validity of maternal recall of breastfeeding duration 6 years after childbirth and its association with sociodemographic factors.
Among 635 mother-child pairs, breastfeeding duration data collected monthly throughout the 1st year after childbirth in the Infant Feeding Practices Study II (IFPS II) were compared to recall data obtained 6 years later during the Year 6 Follow-Up. The intraclass correlation coefficient (ICC) and Bland-Altman plots were examined to study the agreement between the two data sets. Sociodemographic factors associated with accurate recall to within 1 month of the IFPS II breastfeeding duration were assessed using multivariable logistic regression modeling.
Maternal recall of breastfeeding duration was found to be valid 6 years after childbirth with a small median overall bias (1 week) toward overestimation. The overall concordance was high (ICC = 0.84), except for high school graduates (ICC = 0.63) and smokers (ICC = 0.61). Smokers (adjusted odds ratio = 0.52; 95% confidence interval [0.4, 0.8]) and multiparous women (adjusted odds ratio = 0.57; 95% confidence interval [0.4, 0.9]) were also less likely to give an accurate recall of their breastfeeding duration to within 1 month.
Our study found that maternal recall of breastfeeding duration varies by sociodemographic factors but is accurate 6 years after childbirth.
母乳喂养持续时间是妇幼健康与营养研究中常用的重要指标。已证明母亲对母乳喂养开始时间和持续时间的短期回忆是有效的；然而，长期回忆的有效性尚不清楚。研究目的：本研究旨在评估产后6年母亲对母乳喂养持续时间回忆的有效性及其与社会人口学因素的关联。
在635对母婴中，将婴儿喂养实践研究II（IFPS II）中产后第1年每月收集的母乳喂养持续时间数据与6年后6年随访期间获得的回忆数据进行比较。检查组内相关系数（ICC）和布兰德-奥特曼图以研究两个数据集之间的一致性。使用多变量逻辑回归模型评估与IFPS II母乳喂养持续时间在1个月内准确回忆相关的社会人口学因素。
发现产后6年母亲对母乳喂养持续时间的回忆是有效的，总体中位数偏差较小（1周），倾向于高估。总体一致性较高（ICC = 0.84），但高中毕业生（ICC = 0.63）和吸烟者（ICC = 0.61）除外。吸烟者（调整后的优势比 = 0.52；95%置信区间[0.4, 0.8]）和经产妇（调整后的优势比 = 0.57；95%置信区间[0.4, 0.9]）在1个月内准确回忆母乳喂养持续时间的可能性也较小。
我们的研究发现，母亲对母乳喂养持续时间的回忆因社会人口学因素而异，但在产后6年是准确的。
