Table 4.

Results of the Mixed General Linear Model for the State Variables Over Infant Characteristics (n = 282 video recordings)

States	Predictor	Parameter (SE)	p
Quiet sleep	Intercept	0.81 (0.35)	0.022
	PMA	0.09 (0.15)	0.545
Active sleep	Intercept	88.41** (1.82)	0.000
	PMA	-0.07 (0.80)	0.931
	Gender	-4.88* (1.93)	0.012
Drowsy	Intercept	8.48** (1.51)	0.000
	PMA	-0.20 (.66)	0.762
	Gender	3.50* (1.60)	0.030
Awake	Intercept	2.37** (0.70)	0.001
	PMA	0.23 (0.31)	0.463
	Gender	1.51* (0.74)	0.043
Defined	Intercept	86.68** (1.33)	0.000
	PMA	0.35 (0.56)	0.537
	Gender	-4.70** (1.41)	0.002
Diffuse	Intercept	12.78** (1.28)	0.000
	PMA	-0.41 (0.54)	0.453
	Gender	4.61** (1.36)	0.001

Note. SE = standard error. PMA = postmenstrual age. PMA was centered at its mean 35.30 weeks. GA was centered at its mean 32.72 weeks. Birthweight was centered at its mean 1958.62 grams.

^*p < .05, two-tailed.

^**p < .01, two-tailed.

Y = α + β1 (PMA — 35.30) + β2 (GA — 32.72) + β3 (Birthweight — 1958.62) + β4 Gender + β5 Nursery + ε.

Y = individial states; α = intercept; β = parameter; ε = standard error.