Citation

Suvak MK, Walling SM, Iverson KM, Taft CT, Resick PA. J. Trauma. Stress 2009; 22(6): 622-631.

Affiliation

National Center for Posttraumatic Stress Disorder, VA Boston Healthcare System, Boston, MA.

Copyright

(Copyright © 2009, International Society for Traumatic Stress Studies, Publisher John Wiley and Sons)

DOI

10.1002/jts.20476

PMID

19937725

Abstract

Multilevel modeling is a powerful and flexible framework for analyzing nested data structures (e.g., repeated measures or longitudinal designs). The authors illustrate a series of multilevel regression procedures that can be used to elucidate the nature of the relationship between two variables across time. The goal is to help trauma researchers become more aware of the utility of multilevel modeling as a tool for increasing the field's understanding of posttraumatic adaptation. These procedures are demonstrated by examining the relationship between two posttraumatic symptoms, intrusion and avoidance, across five assessment points in a sample of rape and robbery survivors (n = 286). Results revealed that changes in intrusion were highly correlated with changes in avoidance over the 18-month posttrauma period.

Language: en