Mayasari NR, Hu TY, Chao JC, Bai CH, Chen YC, Huang YL, Chang CC, Wang FF, Hadi H, Nurwanti E, Chang JS. Associations of the pre-pregnancy weight status with anaemia and the erythropoiesis-related micronutrient status.
Public Health Nutr 2021;:1-11. [PMID:
34120669 DOI:
10.1017/S1368980021002627]
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Abstract
OBJECTIVE
The coexistence of underweight (UW) and overweight (OW)/obese (OB) at the population level is known to affect iron deficiency (ID) anaemia (IDA), but how the weight status affects erythropoiesis during pregnancy is less clear at a population scale. This study investigated associations between the pre-pregnancy BMI (pBMI) and erythropoiesis-related nutritional deficiencies.
DESIGN
Anthropometry, blood biochemistry and 24-h dietary recall data were collected during prenatal care visits. The weight status was defined based on the pBMI. Mild nutrition deficiency-related erythropoiesis was defined if individuals had an ID, folate depletion or a vitamin B12 deficiency.
SETTING
The Nationwide Nutrition and Health Survey in Taiwan (Pregnant NAHSIT 2017-2019).
PARTICIPANTS
We included 1456 women aged 20 to 45 years with singleton pregnancies.
RESULTS
Among these pregnant women, 9·6 % were UW, and 29·2 % were either OW (15·8 %) or OB (13·4 %). A U-shaped association between the pBMI and IDA was observed, with decreased odds (OR; 95 % CI) for OW subjects (0·6; 95 % CI (0·4, 0·9)) but increased odds for UW (1·2; 95 % CI (0·8, 2·0)) and OB subjects (1·2; 95 % CI (0·8, 1·8)). The pBMI was positively correlated with the prevalence of a mild nutritional deficiency. Compared to normal weight, OB pregnant women had 3·4-fold (3·4; 95 % CI (1·4, 8·1)) higher odds for multiple mild nutritional deficiencies, while UW individuals had lowest odds (0·3; 95 % CI (0·1, 1·2)). A dietary analysis showed negative relationships of pBMI with energy, carbohydrates, protein, Fe and folate intakes, but positive relationship with fat intakes.
CONCLUSION
The pre-pregnancy weight status can possibly serve as a good nutritional screening tool for preventing IDA during pregnancy.
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