Table 1.

Absolute Blood Neutrophil Reference Values According to Ages^4–7

Neonates at term	<6–7.0 × 109/L at 6–24 h of Life	<3.0 × 109/L at 72 h of life
Preterm	<3.0 × 109/L after 24 h of life	<1.0 × 109/L after 72 h of life
Newborns and infants (1 mo–1 y)	<1.0 × 109/L
>12 mo	<1.5 × 109/L
Adult	<1.8 × 109/L