George Goldy C, Hanss-Nuss Henry, Milani Tracey J, Freeland-Graves Jeanne H
Center for Health Promotion and Prevention Research, School of Public Health, The University of Texas Health Science Center, Houston, USA.
J Am Diet Assoc. 2005 Jun;105(6):899-907. doi: 10.1016/j.jada.2005.03.028.
The purpose of this study was to examine dietary behavior during pregnancy and postpartum in a multiethnic sample of low-income women.
Participants were 149 Medicaid-qualified women (30% white, 24% African American, and 46% Hispanic; median age, 22 years).
Subjects were recruited into a longitudinal cohort design 0 to 1 days following delivery. Dietary choices during pregnancy and the first 6 months postpartum were assessed via validated food frequency questionnaires administered at 6 weeks and 6 months postpartum, respectively.
Frequencies and means were used for descriptive purposes. Paired and independent sample t tests were used for continuous variables; chi 2 and McNemar tests were used for categorical variables.
In all subjects, mean daily servings of grains (7.4 vs 6.2, P <.004), vegetables (2.5 vs 2.0, P <.002), and fruit (3.4 vs 1.7, P <.001) declined following childbirth, while the percentage of energy from fat (37.3% vs 38.4%, P <.023) and added sugar (14.4% vs 16.4%, P <.019) increased. Women who breastfed their infants at 6 months postpartum reported lower intakes of total fat (34.2% vs 37.9%, P <.005) during pregnancy and higher fruit (2.2 vs 1.6, P <.05) and vegetable (2.6 vs 1.8, P <.02) intakes in postpartum than those who bottle-fed. Also, a greater proportion of lactating than nonlactating women (66.7% vs 36.9%, P <.05) met recommendations for fruit intake during pregnancy.
The findings suggest that the transition from pregnancy to postpartum may be associated with a negative impact on dietary behavior that could compromise nutritional status in low-income women.
本研究旨在调查低收入多民族女性孕期及产后的饮食行为。
研究对象为149名符合医疗补助资格的女性(30%为白人,24%为非裔美国人,46%为西班牙裔;中位年龄22岁)。
在分娩后0至1天,将研究对象招募进一项纵向队列研究。通过分别在产后6周和6个月时进行的经过验证的食物频率问卷,评估孕期及产后前6个月的饮食选择。
使用频率和均值进行描述性分析。连续变量采用配对和独立样本t检验;分类变量采用卡方检验和 McNemar检验。
在所有研究对象中,产后谷物(7.4份对6.2份,P <.004)、蔬菜(2.5份对2.0份,P <.002)和水果(3.4份对1.7份,P <.001)的日均摄入量下降,而脂肪(37.3%对38.4%,P <.023)和添加糖(14.4%对16.4%,P <.019)提供的能量百分比增加。产后6个月进行母乳喂养的女性孕期总脂肪摄入量较低(34.2%对37.9%,P <.005),产后水果(2.2份对1.6份,P <.05)和蔬菜(2.6份对1.8份,P <.02)摄入量高于人工喂养的女性。此外,孕期水果摄入量达推荐量的哺乳期女性比例高于非哺乳期女性(66.7%对36.9%,P <.05)。
研究结果表明,从孕期到产后的转变可能对饮食行为产生负面影响,进而可能损害低收入女性的营养状况。