Table 5.

Brainstem growth in premature infants and controls estimated from linear generalized estimating equations model.

	Midbrain	Pons	Medulla	Total Brainstem
Healthy controls
Model (y = at + b)
R2	0.65	0.75	0.78	0.82
Growth rate (a), cm3/week	0.06	0.11	0.07	0.23
Constant (b), cm3	−0.15	−1.91	−1.25	−3.32
Premature infants
Model (y = at + b)
R2	0.62	0.71	0.59	0.70
Growth rate (a), cm3/week	0.08	0.10	0.05	0.23
Constant (b), cm3	−1.01	−1.98	−0.80	−3.80