Using the teach-back method to improve postpartum maternal-infant health among women with limited maternal health literacy: a randomized controlled study

Table 3 PMHLS scores of the teach-back and the control group at baseline and postpartum. (n = 258)

PMHLS and subscales	Teach-back group n = 128 M (P₂₅, P₇₅)	Control group n = 130 M (P₂₅, P₇₅)	z value^b	P value
Subscale 1: understanding on the basic knowledge of postpartum health
Baseline	9(6,11)	9(7,11)	−0.414	0.679
42 days postpartum	12(10,13)	10(8,11.25)	−6.845	<0.001
z value^a	−9.010	−6.977
P value	<0.001	<0.001
Subscale 2: awareness of basic skills, healthy lifestyles and health behaviours that could be beneficial for postpartum health
Baseline	9(7,11)	9(6.75,10)	−1.147	0.251
42 days postpartum	10(8.25,11)	9(7,10)	−4.310	<0.001
z value^a	−7.188	−4.379
P value	<0.001	<0.001
Ssubscale 3: practices of obtaining relevant information from different sources
Baseline	2(1,3)	2(1,3)	−1.297	0.195
42 days postpartum	4(3,6)	2(1,3)	−7.148	<0.001
z value^a	−7.809	−3.236
P value	<0.001	<0.001
Total score
Baseline	20.5(16,24)	20(16,23)	−0.747	0.455
42 days postpartum	26.5(23,29)	21(17,24)	−8.103	<0.001
z value^a	−9.820	−7.073
P value	<0.001	<0.001

ISSN: 1471-2393