Weight Change Nomogram of Miller et al for a Formula Fed Newborn During the First 2 Days After Vaginal Delivery

Description

Miller et al used nomograms to describe the weight change in a formula fed neonate in the first 2 days after vaginal delivery. The authors are from Penn State College of Medicine in Hershey, Kaiser Permanente Oakland and the University of California in San Francisco.

An infant may lose 0 to 10% of body weight over the first 2 to 4 days after delivery, then gradually increases in weight for the rest of the first month.

Patient selection: vaginal delivery

Time interval modeled: 6 to 48 hours after delivery

Outcome: percent weight change from birth weight, with weight in grams

weight change in percent =

= ((weight at time) - (birth weight)) / (birth weight) * 100%

For 6 to 30 hours

Percentile	Line Expression
50th	(0.002778 * ((hours)^2)) - (0.2167 * (hours)) + 1.3
75th	(0.003968 * ((hours)^2)) - (0.2795 * (hours)) + 0.92
90th	(0.004762 * ((hours)^2)) - (0.3248 * (hours)) + 0.36
95th	(0.004960 * ((hours)^2)) - (0.3936 * (hours)) + 0.06

For 30 to 48 hours

Percentile	Line Expression
50th	(0.000694 * ((hours)^2)) - (0.06583 * (hours)) -1.345
75th	(0.002083 * ((hours)^2)) - (0.1908 * (hours)) - 0.045
90th	(0.001389 * ((hours)^2)) - (0.125 * (hours)) - 2.6
95th	(-0.0333 * (hours)) - 4.8

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