Are early first trimester weights valid proxies for preconception weight?

被引:48
|
作者
Krukowski, Rebecca A. [1 ]
West, Delia S. [2 ]
DiCarlo, Marisha [3 ]
Shankar, Kartik [4 ]
Cleves, Mario A. [5 ]
Saylors, Marie E. [6 ]
Andres, Aline [4 ]
机构
[1] Univ Tennessee, Hlth Sci Ctr, Dept Prevent Med, 66 N Pauline St, Memphis, TN 38163 USA
[2] Univ South Carolina, Arnold Sch Publ Hlth, Dept Exercise Sci, Columbia, SC 29208 USA
[3] Arkansas Dept Hlth, Off Hlth Commun, Little Rock, AR 72205 USA
[4] Univ Arkansas Med Sci, Arkansas Childrens Nutr Ctr, Dept Pediat, Little Rock, AR 72205 USA
[5] Univ Arkansas Med Sci, Coll Med, Arkansas Childrens Nutr Ctr, Pediat Biostat, Little Rock, AR 72205 USA
[6] Univ Arkansas Med Sci, Coll Med, Pediat Biostat, Little Rock, AR 72205 USA
关键词
Obesity; Obstetrics; Preventive medicine; BODY-MASS INDEX; GAIN; PREGNANCY; WOMEN; GUIDELINES;
D O I
10.1186/s12884-016-1159-6
中图分类号
R71 [妇产科学];
学科分类号
100211 ;
摘要
Background: An accurate estimate of preconception weight is necessary for providing a gestational weight gain range based on the Institute of Medicine's guidelines; however, an accurate and proximal preconception weight is not available for most women. We examined the validity of first trimester weights for estimating preconception body mass index category. Methods: Under identical measurement conditions, preconception weight and two first trimester weights (i.e., 4-10 and 12 weeks gestation) were obtained (n = 43). Results: The 4-10 week and the 12 week weight correctly classified 95 and 91% women, respectively. Mean weight changes were relatively small overall (M = 0.74 +/- 1.99 kg at 4-10 weeks and M = 1.02 +/- 2.46 at 12 weeks). There was a significant difference in mean weight gain by body mass index category at 4-10 weeks (-0.09 +/- 1.86 kg for normal weight participants vs. 1.61 + 1.76 kg for overweight/obese participants, p = 0.01), but not at 12 weeks (0.53 +/- 2.29 kg for normal weight participants vs. 1.54 +/- 2.58 kg for overweight/obese participants). Conclusions: Assigning gestational weight gain guidelines based on an early first trimester weight resulted in 5-9% of women being misclassified depending on the gestational week the weight was obtained. Thus, most women are correctly classified based on a first trimester weight, particularly an early first trimester weight, although it is possible that modeling strategies could be developed to further improve estimates of preconception body mass index category.
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页数:6
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