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2 results

  • Maternal anthropometry as a predictor of birth weight

  • Shamsun Nahar, C G N Mascie-Taylor, Housne Ara Begum
  • Journal:
    Public Health Nutrition / Volume 10 / Issue 9 / September 2007
    Published online by Cambridge University Press:
    01 September 2007, pp. 965-970
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  • Objective

    To determine whether maternal anthropometry predicted birth weight, and if so, to identify which cut-offs provided the best prediction of low birth weight (LBW) in a field situation.

    Design

    Community-based longitudinal study.

    Setting

    A rural union of Bhaluka Upazila, Mymensingh, located 110 km north-west of Dhaka, the capital of Bangladesh.

    Participants

    A total of 1104 normotensive, non-smoking pregnant women who attended community nutrition centres were studied from first presentation at the centre until delivery of their child.

    Results

    Most of the pregnant mothers were between 20 and 34 years of age. Over one-third of the women were nulliparous, while 12.8% were multiparous (parity ≥ 4). Most (93%) mothers registered between the 3rd and 5th month of pregnancy. The frequency of LBW ( < 2500 g) was 17%. Polynomial regression analyses showed that the best predictors of birth weight (based on adjusted R2 values) were in general weight at registration and weight at month 9, with adjusted R2 ranging from 2.5% to nearly 20%. Sequential regression analyses with height and weight showed that there was a significant effect of height after removing the weight variables, and adjusted R2 increased in all analyses. Weight and height at registration month continued to be the best predictors of LBW. Sensitivity and specificity curves were drawn for each registration month, body mass index and different weight gain groups, and using different weight and height combinations. The results showed that, for registration month 3–5, a combination of weight ( ≤ 45 kg) and height ( ≤ 150 cm) gave the highest sensitivity, which was 50%. However, maternal weight ≤ 43 kg in pregnancy month 3–5 alone gave the highest sensitivity of 80%.

    Conclusion

    The best predictor of birth weight as a continuous variable was maternal weight at registration, each 1 kg increase in weight at registration being associated with an increase in birth weight of about 260 g. Maternal weight ≤ 43 kg in pregnancy month 3–5 alone gave the highest sensitivity of 80%. A combination of initial weight and height of the mother was not as good a predictor of LBW as weight alone.

  • A longitudinal study of maternal anthropometric changes in normal weight, overweight and obese women during pregnancy and postpartum

  • Hora Soltani, Robert B. Fraser
  • Journal:
    British Journal of Nutrition / Volume 84 / Issue 1 / July 2000
    Published online by Cambridge University Press:
    09 March 2007, pp. 95-101
    Print publication:
    July 2000
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  • Many women associate one or more of their pregnancies with the development of adult obesity. Such an association has not been fully explored. This longitudinal study examines the changes in maternal anthropometric indices during pregnancy and postpartum. Seventy-seven pregnant subjects were investigated longitudinally at about 13, 25 and 36 weeks gestation, of whom forty-seven continued taking part into the postpartum period. Maternal weight, height and skinfold thickness (triceps, biceps, subscapular, suprailiac and mid thigh) were measured at each visit. Maternal fat mass was estimated from the conversion of the first four skinfold thicknesses. Maternal waist and hip circumferences were also measured at the first visit and 6 weeks and 6 months postpartum. Weight and fat gain during pregnancy (13–36 weeks gestation) was 10·9 (SD 4·7) KG AND 4·6 (sd 3·3) kg (P < 0·001) respectively. A significant increase in fat mass from 13 weeks gestation to 6-months postpartum was observed (2·6 (sd 4·5), P < 0·001). The increased weight at 6-months postpartum, however, was not statistically significant (1·1 (sd 6·0) kg, P = 0·20). Based on BMI in early pregnancy, the subjects were divided into groups of underweight, normal weight, overweight and obese. The last three groups were compared using ANOVA. The obese group showed a significant difference in the pattern of changes in the skinfold thickness, waist: hip ratio and fat mass at the postpartum period, in comparison with the other two groups. In conclusion, there is a tendency in the obese group to develop central obesity at the postpartum period.