Sample Size

Increased Parenteral Amino Acid Administration to Extremely Low‐Birth‐Weight Infants During Early Postnatal Life

“…In that study, the mean difference in serum HCO 3 concentration between groups was 4.2 mEq/L, with a standard deviation of 3.4. We applied sample‐size analysis as described by Brown (33), using α = 0.05 and β = 0.10. Our study involved a greater protein / amino acid increase of 1 g · kg −1 · d −1 compared with the Heird study in which the protein intake was increased by 0.75 g · kg −1 · d −1 .…”

Plasma and Urine Riboflavin During Riboflavin‐Free Nutrition in Very‐Low‐Birth‐Weight Infants

“…To estimate the minimum number of weekly samples needed for analysis, we used power analysis as reviewed by Brown (19). We chose statistical parameters of α = 0.05 and β = 0.10.…”

Plasma and Urine Riboflavin and Pyridoxine Concentrations in Enterally Fed Very‐Low‐Birth‐Weight Neonates

“…To estimate the minimum number of weekly samples needed for analysis, we used power analysis as reviewed by Brown (16). We chose statistical parameters of α = 0.05 and β = 0.1, and a 50% increase from baseline concentration as the difference of interest.…”