Table 3.

Coefficients in the regression analysis. Effects of infants’ LF on the infants’ HF in the paced-breathing condition (n = 19).

Independent variables		Step 1			Step 2
		B	SE B	β	B	SE B	β
Step 1	Change in infants’ LF power in respiration 0–5 min	0.024	0.019	0.294	0.095*	0.030	1.175**
	Developmental stages	10.062	9.395	0.250	14.900†	8.099	0.370†
Step 2	Change in infants’ LF × Developmental stage	—	—	—	0.195**	0.071	1.031*
R2		0.135			0.426*

Note: The dependent variable is the change in the HF power in the infants in respiration 0–5 min.

The standard for the error analysis was 5%. **p < 0.01, *p < 0.05, ^†p < 0.10.