title: Prediction of somatic and non-somatic depressive symptoms between inpatient rehabilitation and follow-up.
abstract: METHODS
  Longitudinal.
  
  
  OBJECTIVE
  We identified changes in the association of somatic and non-somatic symptoms (as measured by the Patient Health Questionnaire-9, PHQ-9) between inpatient rehabilitation after spinal cord injury (SCI) and 1 year after discharge.
  
  
  METHODS
  A specialty hospital in the Southeastern USA.
  
  
  METHODS
  A total of 584 adults with traumatic SCI were administered the PHQ-9 during inpatient rehabilitation. Of them, 227 completed the PHQ-9 by survey at 1-year follow-up. We performed time-lagged regression between times of measurement for somatic and non-somatic factors of the PHQ-9.
  
  
  RESULTS
  The non-somatic factor at baseline was significantly predictive of the non-somatic (r=0.67, P=0.002) and somatic factors at follow-up (r=0.53, P=0.019). The somatic factor did not significantly predict either the somatic (r=0.10, n.s.) or non-somatic factors at follow-up (r=-0.01, NS). Factor analysis also indicated changing factor structure between inpatient rehabilitation and follow-up.
  
  
  CONCLUSIONS
  Our results question the interpretation of somatic items during inpatient rehabilitation, as they are not predictive of either somatic or non-somatic symptoms at follow-up.
authors.affiliation: Department of Health Sciences and Research, College of Health Professions, Medical University of South Carolina, Charleston, SC 29425, USA. krause@musc.edu
authors.forename: J S
authors.initials: JS
authors.lastname: Krause
authors.forename: K S
authors.initials: KS
authors.lastname: Reed
authors.forename: J J
authors.initials: JJ
authors.lastname: McArdle
mesh_terms: D000328:Adult; D003627:Data Interpretation, Statistical; D003866:Depressive Disorder / Q000209:etiology* / Q000523:psychology*; D005163:Factor Analysis, Statistical; D005260:Female; D005500:Follow-Up Studies; D006760:Hospitalization; D006801:Humans; D007297:Inpatients / Q000523:psychology; D008297:Male; D011237:Predictive Value of Tests; D011379:Prognosis; D011569:Psychiatric Status Rating Scales; D012044:Regression Analysis; D013119:Spinal Cord Injuries / Q000150:complications* / Q000523:psychology* / Q000534:rehabilitation