Assessment of abbreviated techniques for determination of milk volume intake of the human milk-fed infant.
Two recently proposed abbreviated techniques for estimation of 24-h milk intake of the breast-fed infant were evaluated as to whether they could serve as appropriate substitutes for measured 24-h intakes. One technique involves the doubling of 12-h milk intakes, whereas the other uses the product of the mean of two consecutive midpoint feedings and the frequency of nursing for the defined 24-h period. Data from three consecutive 24-h intake measurements at 4, 8, and 12 weeks on 22 solely breast-fed infants were used for the evaluation. Correlational and paired t test analyses were conducted to compare intakes from each abbreviated technique with measured intakes. All calculated intakes derived from doubling 12-h periods commencing in the morning exceeded values obtained for full-day measures. These overestimations resulted from higher milk consumption during the early hours of the day, with proportionate intakes ranging from 0.55 to 0.77. Doubled half-day calculations initiated later in the day (2 p.m.-2 a.m.) were similar to mean measured 24-h intakes, with proportionate intakes ranging from 0.47 to 0.51. Correlations between all calculated intakes and measured intakes ranged from 0.51 (p = 0.111) to 0.93 (p = 0.001). Estimated mean intakes derived by the method utilizing nursing frequency and the mean for two nursings were similar to measured 24-h mean intakes. Correlations between such 24-h calculated and measured intakes ranged from 0.70 (p = 0.001) to 0.97 (p less than 0.001).(ABSTRACT TRUNCATED AT 250 WORDS)
D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008895:Milk, Human; D013997:Time Factors