Clinimetric properties of the diagnostic criteria for psychosomatic research among the elderly.

ABSTRACT

INTRODUCTION: Among the elderly, the availability of tool assessing psychosomatic syndromes is limited. The present study aims at testing inter-rater reliability and concurrent validity of the semi-structured interview for the Diagnostic Criteria for Psychosomatic Research (DCPR-R-SSI) in the elderly of the general population. METHOD: One hundred eight subjects were recruited. Participants received a clinical assessment which included the DCPR-R-SSI, the Illness Attitude Scale (IAS), the Geriatric Depression Scale (GDS), the Psychosocial Index (PSI), the Toronto Alexithymia Scale-20 (TAS-20). Analyses of inter-rater reliability of DCPR-R-SSI and concurrent validity between DCPR-R-SSI and self-administered questionnaires were conducted. RESULTS: DCPR-R-SSI showed excellent inter-rater reliability with a percent of agreement of 90.7% (K Cohen 0.856 [SE = 0.043], 95% CI 0.77-0.94). DCPR-R demoralization showed fair concurrent validity with GDS; concurrent validity was also fair between DCPR-R Alexithymia and TAS-20, and between DCPR-R allostatic overload and PSI allostatic load, while the concurrent validity between DCPR-R Disease Phobia and IAS was moderate. CONCLUSION: DCPR-R-SSI represents a reliable and valid tool to assess psychosomatic syndromes in the elderly. DCPR-R is in need of being implemented in the elderly clinical evaluation.