. Author manuscript; available in PMC: 2012 Mar 1.

Published in final edited form as: Neurotoxicol Teratol. 2010 Sep 22;33(2):240–243. doi: 10.1016/j.ntt.2010.09.003

Table 3.

Fetal cardiac and movement parameter comparisons by treatment group

	Methadone	Buprenorphine	z
	M(SD)	M(SD)
24/28 weeks	n = 8	n = 4
Fetal heart rate (bpm)	139.11(5.51)	136.10(7.77)	−0.85
Fetal heart rate variability	3.69(1.01)	5.05(1.04)	−2.06^*
Accelerations	0(0)	1.25(1.89)	−2.09^*
Motor activity	4.80(1.45)	5.95(.79)	−1.36
Movement duration	16.07(4.72)	27.46(14.91)	−1.87^{^}
FHR-FM coupling(%)	7.64(6.49)	18.78(9.26)	−2.04^*
32/36 weeks	n = 6	n=5
Fetal heart rate (bpm)	133.42(7.89)	134.58(7.12)	−0.18
Fetal heart rate variability	4.43(0.78)	5.30(2.16)	−0.37
Accelerations	1.17(1.17)	2.80(3.83)	0
Motor activity	3.58(1.18)	5.92(2.95)	−2.01^*
Movement duration	8.74 (2.71)	21.53 (13.22)	−2.01^*
FHR-FM coupling(%)	27.42(13.97)	18.88(6.90)	−1.10

^{^}

p < .10.

p < .05.