TY - JOUR
T1 - Psychometric evaluation of the Signs of Depression Scale with a revised scoring mechanism in stroke patients with communicative impairment
AU - van Dijk, Mariska J
AU - de Man-van Ginkel, Janneke M.
AU - Hafsteinsdóttir, Thóra B
AU - Schuurmans, Marieke J.
N1 - Publisher Copyright:
© 2017, © The Author(s) 2017.
PY - 2017/12/1
Y1 - 2017/12/1
N2 - Objectives: To investigate (1) the diagnostic value of the Signs of Depression Scale (SODS) in a Likert scale format and (2) whether the Likert scale improves the diagnostic value compared with the original dichotomous scale. Design: Cross-sectional multicentre study. Setting: One general and one university hospital in the Netherlands. Subjects: A total of 116 consecutive hospitalized stroke patients, of whom 53 were patients with communicative impairment. Main measures: Depression was diagnosed with the Composite International Diagnostic Interview (CIDI) administered to the patients’ relatives. The Barthel Index (BI) was used as an external validator. Results: The correlation between the CIDI and the SODS-Likert or the SODS was small (rb = 0.18), and the correlation between the Barthel Index and the SODS-Likert (rs = −0.30) or the SODS (rs = −0.33) was moderate. For both instruments, the discriminatory power for diagnosing depression when compared with the CIDI was best at a cut-off score of ⩾2. The internal consistency of the SODS-Likert was acceptable (α = 0.69) and slightly higher than that of the SODS (α = 0.57). The inter-rater reliability of the SODS-Likert and the SODS was acceptable (intraclass correlation coefficient (ICC) 0.66 and ICC 0.80, respectively). The clinical utility was rated good. Conclusion: The diagnostic value of the SODS did not improve using a Likert scale format. However, the diagnostic value of the original dichotomous SODS is reasonable for the initial mood assessment of stroke patients with communicative impairment.
AB - Objectives: To investigate (1) the diagnostic value of the Signs of Depression Scale (SODS) in a Likert scale format and (2) whether the Likert scale improves the diagnostic value compared with the original dichotomous scale. Design: Cross-sectional multicentre study. Setting: One general and one university hospital in the Netherlands. Subjects: A total of 116 consecutive hospitalized stroke patients, of whom 53 were patients with communicative impairment. Main measures: Depression was diagnosed with the Composite International Diagnostic Interview (CIDI) administered to the patients’ relatives. The Barthel Index (BI) was used as an external validator. Results: The correlation between the CIDI and the SODS-Likert or the SODS was small (rb = 0.18), and the correlation between the Barthel Index and the SODS-Likert (rs = −0.30) or the SODS (rs = −0.33) was moderate. For both instruments, the discriminatory power for diagnosing depression when compared with the CIDI was best at a cut-off score of ⩾2. The internal consistency of the SODS-Likert was acceptable (α = 0.69) and slightly higher than that of the SODS (α = 0.57). The inter-rater reliability of the SODS-Likert and the SODS was acceptable (intraclass correlation coefficient (ICC) 0.66 and ICC 0.80, respectively). The clinical utility was rated good. Conclusion: The diagnostic value of the SODS did not improve using a Likert scale format. However, the diagnostic value of the original dichotomous SODS is reasonable for the initial mood assessment of stroke patients with communicative impairment.
KW - Screening
KW - communication disorder
KW - depression
KW - psychometrics
KW - stroke
UR - http://www.scopus.com/inward/record.url?scp=85034597150&partnerID=8YFLogxK
U2 - 10.1177/0269215517708328
DO - 10.1177/0269215517708328
M3 - Article
C2 - 28511591
SN - 0269-2155
VL - 31
SP - 1653
EP - 1663
JO - Clinical Rehabilitation
JF - Clinical Rehabilitation
IS - 12
ER -