Initial Feasibility and Acceptability of a Comprehensive Intervention for Methamphetamine-Using Pregnant Women in South Africa

Table 2

Test statistics, 𝑃 values, estimated marginal means, and standard errors for primary outcomes (𝑁=36).

Outcome	Effect of interest	Test statistic	𝑃	Means (standard errors)
				RBT+WHC condition (𝑛=17)	PE condition (𝑛=19)
Maternal outcomes
Past 30 day number of times of methamphetamine use	Treatment × time	𝜒^2(1)=0.1	.81	Baseline: 9.2 (2.2)	Baseline: 12.6 (2.5)
				Posttreatment: 3.8 (1.6)	Posttreatment: 5.9 (1.7)
Past 30 day number of times unprotected vaginal intercourse	Treatment × time	𝜒^2(1)=0.5	.49	Baseline: 4.6 (1.1)	Baseline: 4.2 (1.0)
				Posttreatment: 1.1 (0.6)	Posttreatment: 1.6 (0.6)
Number of antenatal obstetrical care visits attended	Treatment	𝜒^2(1)=1.5	.22	1.6 (0.3)	2.5 (0.2)
Neonatal outcomes
Neonatal length of hospital stay†,‡	Treatment	𝜒^2(1)=2.5	.11	2.1 (0.9)	4.2 (0.4)
Birth weight†	Treatment	𝐹(1,31)=0.6	.46	2900.7 (124.1)	2774.3 (113.3)
Gestational age at delivery†	Treatment	𝜒^2(1)=0.1	.75	37.5 (0.02)	37.2 (0.02)

†1 participant completed only the first session and then dropped out of the study, 1 participant miscarried, and 1 participant had her infant die shortly after birth and denied permission for access to her infant’s record ‡and, in addition, the infant discharge date was not available in medical records for 2 other infants.