Patient selection: 19 boys and 15 girls from 9 days to almost 6 years old
Parameters:
(1) gender
(2) body height in centimeters
Exponential equations using height and gender:
tracheal length in cm in boys =
= EXP(-1.13) * ((height in cm)^0.66)
tracheal length in cm in girls =
= EXP(-1.07) * ((height in cm)^0.65)
anteroposterior diameter in cm in boys =
= EXP(-3.87) * ((height in cm)^0.77)
anteroposterior diameter in cm in girls =
= EXP(-5.46) * ((height in cm)^1.13)
transverse diameter in cm in boys =
= EXP(-3.74) * ((height in cm)^0.77)
transverse diameter in cm in girls =
= EXP(-3.81) * ((height in cm)^0.79)
cross-sectional area in square cm in boys =
= EXP(-7.34) * ((height in cm)^1.43)
cross-sectional area in square cm in girls =
= EXP(-9.09) * ((height in cm)^1.83)
volume in cubic cm in boys =
= EXP(-8.48) * ((height in cm)^2.10)
volume in cubic cm in girls =
= EXP(-10.14) * ((height in cm)^2.48)
Linear equations using height as variable:
tracheal length in cm =
= (0.050 * (height in cm)) + 1.78
tracheal anteroposterior diameter in cm =
= (0.0070 * (height in cm)) + 0.05
tracheal transverse diameter in cm =
= (0.0065 * (height in cm)) + 0.18
