# of studies reporting psychometric properties: 2
Interpretability
MCID: not established for SCI
SEM: not established for SCI
MDC: not established for SCI
- Scores over 50 suggest depression. Scores over 69 indicate severe depression.
- Typical values: Mean (SD) Scores:
- Somatic Subscale = 15.4 (4.1)
- Affective Subscale = 21.2 (6.4)
- Total Score = 45.7 (11.9)
(Tate et al. 1993: n=162, 128 males, 34 females; tetraplegia and paraplegia; outpatients)
Reliability
High Internal consistency of the Zung Depression scale (Cronbach’s a = 0.81).
(Tate et al. 1993: n=162, 128 males; tetraplegia and paraplegia; outpatients)
Validity
- Correlation of the Zung total score is High with the Brief Symptom Inventory – global severity index (Pearson’s r = 0.53) and the Brief Symptom Inventory – Depression scale (Pearson’s r = 0.52).
- Inter-correlations between the Medically-Based Emotional Distress Scale subscales and the Zung scale are Moderate to High (ranging from 0.31 to 0.72).
- Correlation of the Zung total score is Moderate with the WHO Quality of Life Scale (correlation = -0.48).
- Correlation of the Zung total score is Moderate with the Community Integration Questionnaire-Revised (CIQ-R) (correlation = -0.42).
(Tate et al. 1993: n=162, 128 males; tetraplegia and paraplegia; outpatients)
(Oversholser et al. 1993: n=81, 63 males, 18 females; 40 quadriplegia, 41 tetraplegia; inpatients and outpatients)
(Xie et al. 2023: n=317; outpatients)
(Chang et al. 2022: n=249; outpatients)
Responsiveness
No values were reported for the responsiveness of the Zung scale for the SCI population.
Floor/Ceiling Effect
No values were reported for the presence of floor/ceiling effects in the Zung scale for the SCI population.
Reviewer
Jane Hsieh, Dr. Carlos L. Cano-Herrera, Elsa Sun
Date Last Updated
31 December 2024
