The Validity and Reliability of a Scale on Postnatal Posttraumatic Stress Symptoms Related to Childbirth among Japanese Women: Evaluation of the Japanese-language Version of the Impact of Event Scale-revised
- *Corresponding Author:
- Yoko Obayashi
Course of Nursing Science, Graduate School of Medicine
Mie University, 2-174 Edobashi, Tsu-city, Mie 514-8507, Japan
E-mail: [email protected]
Received date: May 14, 2016; Accepted date: May 30, 2016; Published date: June 10, 2016
Citation: Obayashi Y, Iriyama S, Suzuki A, Obata S (2016) The Validity and Reliability of a Scale on Postnatal Posttraumatic Stress Symptoms Related to Childbirth among Japanese Women: Evaluation of the Japanese-language Version of the Impact of Event Scale-revised. J Women’s Health Care 5:316. doi:10.4172/2167-0420.1000316
Copyright: © 2016 Obayashi Y, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Objective: The aim of this study was to examine the validity and reliability of the Postnatal Women Version of Japanese-language version of the Impact of Event Scale-Revised (IES-R-J-PWV) at one month after childbirth among Japanese women.
Methods: Data were collected at two general hospital maternity wards and one obstetric clinic in Aichi Prefecture from July to December 2013. A total of 260 postnatal Japanese women participated in this study. The women completed anonymous self-report questionnaires at one month postpartum. To examine the construct validity of the IES-R-J-PWV, we conducted exploratory factor analysis with promax rotation. We evaluated the criterion-related validity of the IES-R-J-PWV using Spearman’s correlation coefficients between IES-R-J scores and scale scores from the Japanese Edinburgh Postpartum Depression Scale (JEPDS), the Visual Analog Scale (VAS), and the Sense of Coherence-13 (SOC-13) instrument.
Results: Exploratory factor analysis revealed that the IES-R-J-PWV was composed of four factors. The total subscale scores for the four factors significantly correlated with each subscale score. The IES-R-J-PWV was positively correlated with the JEPDS (rs = 0.40, p < 0.01) and the VAS (rs = 0.47, p < 0.01) and negatively correlated with the SOC-13 (rs = -0.33, p < 0.01). The IES-R-J-PWV had good internal consistency, with a Cronbach’s α coefficient of 0.92.
Conclusions: The results of this study indicated that the IES-R-J-PWV was a valid and acceptable instrument for measuring and evaluating postnatal posttraumatic stress symptoms related to childbirth among Japanese women at one month after childbirth.