Title
Good reliability and validity for a new utility instrument measuring the birth experience, the Labor and Delivery Index
Author
Gärtner, F.R.
de Miranda, E.
Rijnders, M.E.
Freeman, L.M.
Middeldorp, J.M.
Bloemenkamp, K.W.M.
Stiggelbout, A.M.
van den Akker-van Marle, M.E.
Publication year
2015
Abstract
Objectives To validate the Labor and Delivery Index (LADY-X), a new delivery-specific utility measure. Study Design and Setting In a test–retest design, women were surveyed online, 6 to 8 weeks postpartum and again 1 to 2 weeks later. For reliability testing, we assessed the standard error of measurement (S.E.M.) and the intraclass correlation coefficient (ICC). For construct validity, we tested hypotheses on the association with comparison instruments (Mackey Childbirth Satisfaction Rating Scale and Wijma Delivery Experience Questionnaire), both on domain and total score levels. We assessed known-group differences using eight obstetrical indicators: method and place of birth, induction, transfer, control over pain medication, complications concerning mother and child, and experienced control. Results The questionnaire was completed by 308 women, 257 (83%) completed the retest. The distribution of LADY-X scores was skewed. The reliability was good, as the ICC exceeded 0.80 and the S.E.M. was 0.76. Requirements for good construct validity were fulfilled: all hypotheses for convergent and divergent validity were confirmed, and six of eight hypotheses for known-group differences were confirmed as all differences were statistically significant (P-values: <0.001–0.023), but for two tests, difference scores did not exceed the S.E.M. Conclusion The LADY-X demonstrates good reliability and construct validity. Despite its skewed distribution, the LADY-X can discriminate between groups. With the preference weights available, the LADY-X might fulfill the need for a utility measure for cost-effectiveness studies for perinatal care interventions.
Subject
Life
CH - Child Health
ELSS - Earth, Life and Social Sciences
Healthy for Life
Health
Healthy Living
Patient-reported outcome measure (PROM)
Labor experiences
Obstetrics
Utility measure
Measurement properties
Questionnaire
Adult
Analgesia
Assessment of humans
Construct validity
Delivery
Educational status
Female
Health survey
Home delivery
Human
Labor and Delivery Index
Mackey Childbirth Satisfaction Rating Scale
Major clinical study
Married person
Midwife
Obstetrician
Puerperium
Reliability
Secondary health care
Wijma Delivery Experience Questionnaire
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DOI
https://doi.org/10.1016/j.jclinepi.2015.05.020
TNO identifier
528260
Source
Journal of Clinical Epidemiology, 68 (10), 1184-1194
Document type
article