Similar factors predict disability and posttraumatic stress disorder trajectories after whiplash injury

Sterling, Michele, Hendrikz, Joan and Kenardy, Justin (2011) Similar factors predict disability and posttraumatic stress disorder trajectories after whiplash injury. Pain, 156 6: 1272-1278. doi:10.1016/j.pain.2011.01.056

Author Sterling, Michele
Hendrikz, Joan
Kenardy, Justin
Title Similar factors predict disability and posttraumatic stress disorder trajectories after whiplash injury
Journal name Pain   Check publisher's open access policy
ISSN 0304-3959
Publication date 2011-06
Sub-type Article (original research)
DOI 10.1016/j.pain.2011.01.056
Volume 156
Issue 6
Start page 1272
End page 1278
Total pages 7
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2012
Language eng
Formatted abstract
Distinct developmental trajectories for neck disability and posttraumatic stress disorder (PTSD) symptoms after whiplash injury have recently been identified. This study aimed to identify baseline predictors of membership to these trajectories and to explore their dual development. In a prospective study, 155 individuals with whiplash were assessed at <1 month, 3, 6, and 12 months postinjury. Outcomes at each time point were assessed according to the Neck Disability Index and the Posttraumatic Stress Diagnostic Scale. Baseline predictor variables were age, gender, initial pain (based on a visual analogue scale [VAS]), pressure pain thresholds (PPT), cold pain thresholds (CPT), and sympathetic vasoconstrictor responses. Group-based trajectory analytical techniques were used to parameterise the optimal trajectories and to identify baseline predictors. A dual trajectory analysis was used to explore probabilities of conditional and joint trajectory group membership. CPT greater-or-equal, slanted 13°C (OR = 26.320, 95% CI = 4.981–139.09), initial pain level (VAS) (OR = 4.3, 95% CI = 4.98–139.1), and age (OR = 1.109, 95% CI = 1.043–1.180) predicted a chronic/severe disability trajectory. The same baseline factors also predicted chronic moderate/severe PTSD (CPT greater-or-equal, slanted 13°C, OR = 9.7, 95%CI = 2.22–42.44; initial pain level [VAS]: OR = 2.13, 95% CI = 1.43–3.17; age: OR = 1.07, 95% CI = 1.01–1.14). There was good correspondence of trajectory group for both disability and PTSD. These findings support the proposal of links between the development of chronic neck related disability and PTSD after whiplash injury.
Keyword Whiplash injury
Posttraumatic stress
Developmental trajectories
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes This publication is for the Centre for National Research on Disability and Rehabilitation Medicine (CONROD), University of Queensland

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Medicine Publications
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Citation counts: TR Web of Science Citation Count  Cited 29 times in Thomson Reuters Web of Science Article | Citations
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Created: Thu, 23 Jun 2011, 09:26:58 EST by Chesne McGrath on behalf of Medicine - Royal Brisbane and Women's Hospital