BMC Medical Research Methodology

Table 2 Standard psychometric measures: descriptive statistics and correlation with MGI

From: The feasibility and acceptability of using the Mother-Generated Index (MGI) as a Patient Reported Outcome Measure in a randomised controlled trial of maternity care

						Correlation with MGI
		Mean	SD	Range	IQR	r	p
MGI	Baseline	7.6	1.51	0–10	1.80	n/a
	6 weeks PN	7.6	1.48	0–10	1.65	n/a
EQ-5D-3L	Baseline	.92	0.12	0.13–1	0.20	.225	p < .01
	6 weeks PN	.91	0.15	−.594–1	0.15	.226	p < .01
EPDS	Baseline	6.4	4.53	0–26	6.00	−.350	p < .01
	6 weeks PN	4.9	4.41	0–22	6.00	−.395	p < .01
SWLS	Baseline	28.1	4.88	9–35	5.00	.464	p < .01
	6 weeks PN	29.3	4.57	10–35	6.00	.334	p < .01
STAI	Baseline	10.2	3.52	6–22	5.00	−.255	p < .01
	6 weeks PN	9.3	3.42	0–23	5.00	−.306	p < .01

Key
IQR Interquartile Range, EQ-5D-3L Euroqol 5D [3L version], EPDS Edinburgh Postnatal Depression Scale, SWLS Satisfaction With Life Scale, STAI State Trait Anxiety Inventory, 6 weeks PN 6 weeks postnatal

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ISSN: 1471-2288

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