Mullaney Laura, O'Higgins Amy C, Cawley Shona, Doolan Anne, McCartney Daniel, Turner Michael J
School of Biological Sciences, Dublin Institute of Technology, Dublin 8, Republic of Ireland.
UCD Centre for Human Reproduction, Coombe Women and Infants University Hospital, Dublin 8, Republic of Ireland.
J Public Health (Oxf). 2015 Dec;37(4):728-36. doi: 10.1093/pubmed/fdu086. Epub 2014 Oct 29.
The purpose of this cross-sectional study was to examine periconceptional misreporting of energy intake (EI) using the Willet food frequency questionnaire (WFFQ).
Women were recruited in the first trimester. Women completed a semi-quantitative WFFQ. Maternal body composition was measured using eight-electrode bioelectrical impedance analysis. Under-reporters were those whose ratio of EI to their calculated basal metabolic rate fell below the calculated plausible threshold for their physical activity category.
The mean age was 30.1 ± 5.3 years (n = 524). The mean body mass index (BMI) was 25.4 ± 5.6 kg/m(2), and 16.6% were obese (BMI ≥ 30.0 kg/m(2)). Under-reported EI was observed in 122 women (23.3%) with no over-reporters in the sample. Under-reporters were younger (P < 0.001), less likely to have a normal BMI (P = 0.002) and more likely to be obese (P < 0.001) than plausible reporters. Under-reporters had higher percentage of body-fat and lower percentage of body fat-free mass (P < 0.001), were more likely to be at risk of relative deprivation (P = 0.001) and reported a higher percentage of EI from carbohydrate (P = 0.02) than plausible reporters.
Observed differences between under-reporters and plausible reporters suggest that the exclusion of these under-reporters represents an important potential source of bias in obesity research among women in the periconceptional period.
本横断面研究的目的是使用威尔特食物频率问卷（WFFQ）来检测孕期能量摄入（EI）的误报情况。
在孕早期招募女性。女性完成一份半定量的WFFQ。使用八电极生物电阻抗分析法测量母体身体成分。低报者是指其EI与计算出的基础代谢率之比低于其身体活动类别计算出的合理阈值的人。
平均年龄为30.1±5.3岁（n = 524）。平均体重指数（BMI）为25.4±5.6kg/m²，16.6%为肥胖者（BMI≥30.0kg/m²）。在122名女性（23.3%）中观察到EI低报情况，样本中无高报者。与合理报告者相比，低报者更年轻（P<0.001），BMI正常的可能性更小（P = 0.002），肥胖的可能性更大（P<0.001）。低报者的体脂百分比更高，去脂体重百分比更低（P<0.001），相对剥夺风险更高（P = 0.001），并且来自碳水化合物的EI百分比更高（P = 0.02）。
低报者与合理报告者之间观察到的差异表明，排除这些低报者是孕期女性肥胖研究中一个重要的潜在偏差来源。
