Centre for Epidemiologic Studies Depression Scale (CES-D)

Abstract

The Centre of Epidemiology Studies Depression Scale (CES-D) was developed by Lenore Sawyer Radloff in 1977 as a rapid, self-report instrument designed to screen for the presence of depressive symptoms within the general population. The original scale comprises 20 items rated on a 4-point Likert scale, assessing symptoms experienced over the past week. With scores ranging from 0 to 60, a cutoff score of 16 or higher suggests the need for further clinical assessment. The CES-D has demonstrated robust psychometric properties, including strong internal consistency (Cronbach’s alpha 0.85 to 0.90) and moderate test-retest reliability.

Although initially validated in US adult populations, its applicability has been extended across various age groups, from adolescence to old age, and across diverse cultures, including Chinese and Australian samples. It is crucial to note that the CES-D, including its revised version (CESD-R), is intended solely as a screening or monitoring tool and is not a definitive diagnostic instrument for Major Depressive Disorder. Health professionals utilize it as a cost-effective measure preceding formal diagnostic procedures.

Keywords

CES-D, depression, screening scale, self-report, psychometrics, Radloff, depressive symptoms, affect, somatic symptoms, Likert scale, epidemiology, clinical assessment.

Authors

Lenore Sawyer Radloff

Purpose

The primary purpose of the CES-D is to serve as an efficient, cost-effective screening tool for identifying individuals in the general population who may be experiencing clinically significant depressive symptoms. The scale is specifically utilized to indicate the potential presence of a depressive disorder, thereby necessitating subsequent, comprehensive diagnostic evaluation by a health professional. A score exceeding 16 is conventionally used as the threshold for recommending further assessment.

Furthermore, the CES-D is highly valuable in longitudinal studies and clinical settings for monitoring changes in symptom severity. It allows researchers and clinicians to observe the decline or increase in symptoms over time, particularly in response to therapeutic interventions or treatment protocols. It is explicitly stated that neither the original CES-D nor the revised CESD-R should be used as standalone diagnostic instruments (Radloff, 1977), but rather as preliminary screeners or research measures.

Construct

The CES-D measures the frequency and severity of depressive symptoms experienced by the respondent over the preceding week. The construct encompasses a broad spectrum of depressive manifestations, including mood states, physiological complaints, cognitive symptoms, and interpersonal difficulties, aligning with common definitions of depression symptomology prevalent during its development.

The original scale items address four primary conceptual areas identified through factor analysis: depressed affect, positive affect, somatic and retarded activity, and interpersonal functioning. The scoring methodology, which aggregates responses across 20 items, yields a total severity score (0–60). Specific instructions dictate the reverse-scoring of items 4, 8, 12, and 16 to accurately reflect the overall symptom burden.

Validity

The original validation studies conducted by Radloff (1977) established the convergent validity of the CES-D by comparing its results with established clinician-rated instruments. The CES-D demonstrated moderate correlations (ranging from 0.44 to 0.54) when compared with the Hamilton Clinician’s Rating Scale and the Raskin Rating Scale.

Radloff (1977) noted that this convergent correlation significantly improved, ranging from 0.69 to 0.75, following four weeks of treatment administration, although users are cautioned regarding the interpretation of this increase due to potential external factors. Beyond initial US samples (African American and White American adults), the scale’s applicability has been validated across a wide demographic spectrum, including adolescents, the elderly, and diverse cultural groups, notably Chinese populations (Cheng & Chan, 2005), confirming its broad population validity. Norms have also been established in an Australian general adult population sample (Crawford et al., 2011).

Reliability

The CES-D exhibits strong internal consistency, a measure of how well items within the scale measure the same underlying construct. Reported values for Cronbach’s alpha typically fall within the excellent range of 0.85 to 0.90 (Radloff, 1977), indicating high homogeneity among the 20 items.

Test-retest reliability, which assesses the stability of scores over time, is generally considered acceptable for a screening tool. The correlations reported in the initial validation studies ranged from 0.45 to 0.70 across various intervals, with only one correlation falling outside this range, suggesting reasonable stability when administered across short intervals, which is appropriate for a state measure of symptoms experienced in the recent past.

Factor Analysis

The original structure of the CES-D, based on factor analysis (Radloff, 1977), separated the 20 items into four primary factors:

• Depressed Affect
• Positive Affect (Reverse-scored items)
• Somatic and Retarded Activity
• Interpersonal Functioning

However, subsequent research has suggested refinements to improve model fit, particularly in alignment with contemporary diagnostic criteria. Carleton et al. (2013) proposed a superior fit using a three-factor, 14-item model consisting of Negative Affect, Anhedonia, and Somatic Symptoms. This research also included a critique of the relevance and wording of some original items. Furthermore, the revised CESD-R (Eaton et al., 2004) introduced significant structural changes, including reworded questions and the incorporation of self-harm indicators, such as items concerning suicidal ideation, rated on a 5-point scale.

Instrument

Test Type: Screening Instrument (Self-Report)

Format: 20 items (Original CES-D); 4-point Likert scale ranging from 0 (rarely or none of the time) to 3 (most or all of the time). The revised CESD-R uses a 5-point scale and includes self-harm items.

Language Available: English (Tested cross-culturally, including Chinese populations).

Population Group: General Population Research and Clinical Screening.

Age Group: Adolescence to Old Age.

Population Details: Developed in the United States and initially tested in African American and White American adults. It has established norms in Australian samples and broad applicability across different cultures.

Test Methodology: Self-administered questionnaire designed to measure symptoms experienced in the past week. Total scores range from 0 to 60. Items 4, 8, 12, and 16 are reverse-scored. A score exceeding 16 is the standard cutoff for indicating potential depressive symptomology warranting further professional assessment.

Keywords

CESD-R, screening, psychological assessment, psychometrics, internal consistency, Cronbach’s alpha, convergent validity, diagnosis, monitoring, public domain, mental health, emotional state.

Authors

Author ORCID Identifier: N/A

Affiliation Email addresses: N/A

Correspondence Address: N/A

Permissions & Fee and Test Year

The CES-D is a freely available tool and is considered to be in the public domain, ensuring its widespread accessibility for research and clinical screening purposes globally. No fee is required for its use.

The original scale was developed and published in 1977 by Lenore Sawyer Radloff. The revised version (CESD-R) was reviewed and published in 2004 by Eaton et al.

Reference’s

The original PDF for the CESD-R can be downloaded here: http://www.brandeis.edu/roybal/docs/CESD-R_Website_PDF.pdf

• Carleton R. N, Thibodeau M. A., Teale M. J., Welch P. G., Abrams M. P., Robinson T., Asmundson G. J. (2013). The center for epidemiologic studies depression scale: a review with a theoretical and empirical examination of item content and factor structure. PLoS One. doi: 10.1371/journal.pone.0058067.
• CESD-R The Centre of Epidemiology Studies Depression Scale Revised. (n.d.). Retrieved from http://cesd-r.com/cesdr/.
• Cheng S. T. & Chan, A. C. (2005). The Centre for Epidemiologic Studies Depression Scale in Older Chinese: Thresholds for long and short forms. International Journal of Geriatric Psychiatry, 20(5), 465–470. doi: 10.1002/gps.1314.
• Crawford, J. R., Cayley, C., Lovibond, P. F., Wilson, P. H., & Hartley, C. (2011). Percentile norms and accompanying interval estimates from an Australian general adult population sample for self-report mood scales (BAI, BDI, CRSD, CES-D, DASS, DASS-21, STAI-X, STAI-Y, SRDS, and SRAS). Australian Psychologist, 46, 3–14. doi:10.1111/j.1742-9544 .2010.00003.x
• Eaton W. W., Muntaner C., Smith C., Tien A., Ybarra M. (2004). Center for Epidemiologic Studies Depression Scale: Review and revision (CESD and CESD-R). In Maruish M. E., (Eds.). The Use of Psychological Testing for Treatment Planning and Outcomes Assessment. (pp. 363-377). Mahwah, New Jersey: Lawrence Erlbaum.
• Radloff L. S. (1977). The CES-D scale: a self-report depression scale for research in the general population. Applied Psychological Measurement. 1 3, 85-401.
• The Centre of Epidemiology Studies Depression Scale Revised (CESD-R). (n.d.) http://www.brandeis.edu/roybal/docs/CESD-R_Website_PDF.pdf.

Items of the Centre of Epidemiology Studies Depression Scale (CES-D)

IMPORTANT: The following scale items must be preserved in their original language and must not be changed in any way.

Example items from the original CES-D (Radloff, 1977) include:

• “during the past week I was bother by things that don’t bother me”
• “I thought my life had been a failure”

Example items added in the revised CESD-R (Eaton, 2004) to address self-harm indicators include:

• “I wanted to hurt myself”
• “I wish I was dead”