Reliability and Validity of the Japanese Version of the Short Form of the Expanded Version of the Posttraumatic Growth Inventory (PTGI-X-SF-J): A Cross-Sectional Study

Rei Oshiro; Takafumi Soejima; Sachiko Kita; Kayla Benson; Satoshi Kibi; Koichi Hiraki; Kiyoko Kamibeppu; Kanako Taku

doi:10.3390/ijerph20115965

Reliability and Validity of the Japanese Version of the Short Form of the Expanded Version of the Posttraumatic Growth Inventory (PTGI-X-SF-J): A Cross-Sectional Study

Int J Environ Res Public Health. 2023 May 26;20(11):5965. doi: 10.3390/ijerph20115965.

Authors

Rei Oshiro^{1

2}, Takafumi Soejima^{1

3}, Sachiko Kita^{1

4}, Kayla Benson⁵, Satoshi Kibi¹, Koichi Hiraki⁶, Kiyoko Kamibeppu^{1

7}, Kanako Taku⁵

Affiliations

¹ Department of Family Nursing, Division of Health Sciences and Nursing, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan.
² Department of Nursing, School of Nursing, Hyogo Medical University, Kobe 650-8530, Japan.
³ Department of Child Health Nursing, Graduate School of Health Sciences, Kobe University, Kobe 654-0142, Japan.
⁴ Department of Health Policy, National Center for Child Health and Development, Tokyo 157-8535, Japan.
⁵ Department of Psychology, Oakland University, Rochester, MI 48309-4482, USA.
⁶ Department of Social Welfare, Chinzeigakuin University, Nagasaki 854-0082, Japan.
⁷ Graduate Programs in Family Nursing, International University of Health and Welfare, Tokyo 107-8402, Japan.

Abstract

A Japanese version of the short form of the expanded Posttraumatic Growth Inventory (PTGI-X-SF-J) was developed in this study, as the extended version captures broader, more diverse personal growth perspectives, such as existential spiritual growth. We collected cross-sectional data from 408 (first sample) and 284 (second sample) Japanese university students using the expanded version of the Posttraumatic Growth Inventory (PTGI-X-J). Exploratory factor analysis (EFA) was performed with the first sample and confirmatory factor analysis (CFA) with the second; reliability and validity were examined. The short-form version resulting from the EFA and CFA comprised 10 items and five factors. Cronbach's alpha for the PTGI-X-SF-J total and subscale scores ranged from 0.671 to 0.875. The intraclass correlation coefficient for the total and subscale scores between the PTGI-X-J and PTGI-X-SF-J ranged from 0.699 to 0.821. Regarding external validity, no significant correlation was found between posttraumatic growth and posttraumatic stress disorder checklists. Due to its brevity, the PTGI-X-SF-J can help assess diverse spiritual and existential personal growth experiences among clients, patients, and trauma survivors while reducing physical and psychological burdens.

Keywords: Japanese; PTG assessment; Posttraumatic Growth Inventory; posttraumatic growth.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Cross-Sectional Studies
East Asian People
Humans
Posttraumatic Growth, Psychological*
Reproducibility of Results
Stress Disorders, Post-Traumatic* / psychology

Grants and funding

This work was supported by a Grant-in-Aid for Early-Career Scientist awarded to Rei Oshiro (grant number 21K17382) and Grant-in-Aid for Early-Career Scientist (B) awarded to Takafumi Soejima (grant number 16K20786).