GDS-15 Calculator — Geriatric Depression Scale

What is the Geriatric Depression Scale (GDS-15)?

An 82-year-old patient presents to a geriatric outpatient clinic following a recent hip fracture. Her family reports she has been withdrawn, stopped attending her weekly card group, and repeatedly says she sees no point in going to rehabilitation. The treating physician needs an objective, validated depression screen — not a clinical impression — before initiating any pharmacological or psychological intervention.

The Geriatric Depression Scale Short Form (GDS-15) is a 15-item, yes/no self-report questionnaire developed by Sheikh and Yesavage (1986) as a shortened version of the original 30-item GDS (Yesavage et al., 1983). It is validated specifically for adults aged 65 and older, making it the first-line depression screening tool in geriatric clinical practice. The yes/no response format was deliberately chosen to reduce cognitive burden — older adults with mild memory difficulties can complete the GDS-15 reliably without the multi-point rating scales used in tools like the PHQ-9.

The GDS-15 is in the public domain, requires no licensing or copyright permission, and is administered in approximately 5 minutes either as a patient self-report or clinician-administered interview. It is required for Medicare Annual Wellness Visits and is embedded in the Minimum Data Set (MDS 3.0) protocol for skilled nursing facility residents. For related geriatric assessment tools, see the Katz ADL Index and the Clinical Frailty Scale.

How to Score the GDS-15 — Interpretation Guide

Each of the 15 questions receives either 0 or 1 point. The scoring direction varies by question: for 10 items, answering Yes scores 1 depressive point. For 5 positively framed items (questions 1, 5, 7, 11, 13), answering No scores 1 depressive point. This bidirectional scoring prevents acquiescence bias — the tendency of some older adults to answer all questions affirmatively.

Score Range	Classification	Screen Result	Recommended Action
0 – 4	Normal	Negative	Routine care; reassess at next visit or if mood changes occur
5 – 8	Mild Depression	Positive	Clinical interview for DSM-5 MDD; medication review; social assessment; watchful waiting or psychological support
9 – 11	Moderate Depression	Positive	Geriatric psychiatry or psychology assessment; antidepressant evaluation; care planning; suicide risk assessment
12 – 15	Severe Depression	Positive	Urgent psychiatric referral; immediate suicide risk assessment; medication therapy; caregiver involvement in safety planning
Cut-off ≥5: Sensitivity 92% \| Specificity 89%		Validated against DSM-IV major depressive disorder in adults aged 65+ (Sheikh & Yesavage, 1986)

Clinical Significance of the GDS-15

Depression affects approximately 15–20% of community-dwelling older adults and up to 40% of older adults in long-term care settings, making it the most prevalent psychiatric condition in geriatric populations. Despite its prevalence, depression is severely under-detected in older adults, partly because it frequently presents atypically — as cognitive complaints, somatic symptoms, withdrawal, or functional decline — rather than the classic low mood presentation seen in younger patients.

The GDS-15 was specifically designed to address this detection gap. By avoiding somatic items (sleep, appetite, energy, psychomotor changes), which are commonly caused by medical comorbidities in older patients rather than depression, the GDS achieves higher specificity than general depression tools in this population. Research by Friedman et al. (2005) confirmed that the GDS-15 maintains its diagnostic accuracy even in the presence of significant medical illness — a critical property for tools used in hospital, rehabilitation, and long-term care settings.

Untreated depression in older adults is associated with accelerated functional decline, increased fall risk, poorer rehabilitation outcomes, higher hospital readmission rates, and increased all-cause mortality. Early detection and treatment is therefore not merely a quality-of-life issue — it is a patient safety and outcomes issue with measurable clinical consequences.

When to Use This Calculator

The GDS-15 is indicated for the following clinical situations:

Routine screening in adults aged 65 and older during annual wellness visits (required for Medicare AWV)
Admission screening in inpatient rehabilitation, skilled nursing facilities, and long-term care (MDS 3.0 requirement)
Post-hospitalization follow-up, particularly after major medical events (hip fracture, stroke, cardiac surgery, cancer diagnosis)
When a patient or caregiver reports mood changes, withdrawal, reduced activity, or unexplained functional decline
Monitoring treatment response — repeated at 4–8 week intervals after initiating pharmacological or psychological treatment
Pre-operative assessment in older surgical patients where depression may affect recovery trajectory

The GDS-15 is not appropriate for patients with severe dementia (MMSE < 15), active psychosis, or those unable to understand and respond to yes/no questions. In these cases, the Cornell Scale for Depression in Dementia (CSDD) is the recommended alternative.

Minimal Clinically Important Difference (MCID)

The GDS-15 does not have a formally established Minimal Detectable Change (MDC) in the same way as performance-based tools. However, research literature consistently uses a change of ±2 points as a threshold for clinically meaningful change when monitoring treatment response over time. A reduction of 2 or more points from a positive baseline score suggests a meaningful improvement in depressive symptomatology. Stable scores (change <2 points) in a patient receiving treatment may indicate inadequate response and warrant clinical reassessment.

Clinical Perspective: Depression Screening in Geriatric Practice

Depression in older adults is frequently characterized by presentations that deviate from the classic symptom profile observed in younger populations. Clinicians working with geriatric patients regularly encounter what is described in the literature as "depression without sadness" — where the patient does not report low mood as a primary complaint but instead presents with anhedonia, social withdrawal, unexplained functional decline, increased somatic concerns, or cognitive complaints disproportionate to objective findings.

This atypical presentation pattern, combined with the normalization of low mood as an expected consequence of aging — by both patients and clinicians — contributes to chronically low detection rates in routine clinical encounters. Population-based studies consistently document that fewer than 50% of clinically significant depression cases in older adults are identified during standard medical visits without systematic screening.

The GDS-15 addresses this gap by providing a structured, validated framework for detection that does not rely on clinical impression or spontaneous disclosure. The yes/no format reduces the cognitive and linguistic demands placed on the respondent, improving completion rates and reliability in populations with mild cognitive impairment. The deliberate exclusion of somatic symptom items — a defining methodological choice of the original developers — improves diagnostic specificity in medically complex older patients where somatic symptoms are often attributable to physical rather than psychiatric conditions.

From a clinical implementation perspective, the GDS-15 functions most effectively when embedded in a systematic screening protocol rather than administered on an ad hoc basis. Research demonstrates significantly higher detection rates when screening is routine and standardized, compared to opportunistic or clinician-triggered administration. Integration into admission workflows, annual wellness visit protocols, and post-acute care pathways achieves the consistent detection rates that justify the tool's established validity metrics.

A positive screen result (score ≥5) should be understood as the beginning of a clinical process, not a conclusion. The diagnostic pathway following a positive screen — structured clinical interview, medication review, medical workup for organic contributors, and functional assessment — is where the screen's clinical value is fully realized. The GDS-15 identifies who needs that evaluation; clinical judgment determines what the evaluation reveals.

Written by Nikhil Mahajan, PT, MPT · Clinically reviewed August 15, 2026 · MedicalCalculatorHub

GDS-15 Score Interpretation Reference

Score	Classification	Clinical Description	Action
0 – 4	Normal	No significant depression detected on screening	Routine care; reassess at next visit
5 – 8	Mild Depression	Mild depressive symptoms — screen positive	Clinical interview for MDD, medication review, social assessment, consider watchful waiting or psychological support
9 – 11	Moderate Depression	Moderate depression — significant functional impact	Psychiatric or geriatric assessment, medication evaluation, consider antidepressant therapy, care planning
12 – 15	Severe Depression	Severe depression — urgent evaluation needed	Urgent psychiatric referral, suicide risk assessment, medication therapy, caregiver support
Sensitivity: 92% \| Specificity: 89%	At cut-off ≥5, validated against DSM-IV major depressive disorder in adults aged 65+

Score

Classification

Clinical Description

Action

0 – 4

Normal

No significant depression detected on screening

Routine care; reassess at next visit

5 – 8

Mild Depression

Mild depressive symptoms — screen positive

Clinical interview for MDD, medication review, social assessment, consider watchful waiting or psychological support

9 – 11

Moderate Depression

Moderate depression — significant functional impact

Psychiatric or geriatric assessment, medication evaluation, consider antidepressant therapy, care planning

12 – 15

Severe Depression

Severe depression — urgent evaluation needed

Urgent psychiatric referral, suicide risk assessment, medication therapy, caregiver support

Sensitivity: 92% | Specificity: 89%

At cut-off ≥5, validated against DSM-IV major depressive disorder in adults aged 65+

GDS-15 Questions — Scoring Reference

#	Question	Depressive Answer (scores 1)
1	Are you basically satisfied with your life?	NO
2	Have you dropped many of your activities and interests?	YES
3	Do you feel that your life is empty?	YES
4	Do you often get bored?	YES
5	Are you in good spirits most of the time?	NO
6	Are you afraid that something bad is going to happen to you?	YES
7	Do you feel happy most of the time?	NO
8	Do you often feel helpless?	YES
9	Do you prefer to stay at home, rather than going out and doing things?	YES
10	Do you feel you have more problems with memory than most?	YES
11	Do you think it is wonderful to be alive now?	NO
12	Do you feel pretty worthless the way you are now?	YES
13	Do you feel full of energy?	NO
14	Do you feel that your situation is hopeless?	YES
15	Do you think that most people are better off than you are?	YES

Question

Depressive Answer (scores 1)

Are you basically satisfied with your life?

Have you dropped many of your activities and interests?

YES

Do you feel that your life is empty?

YES

Do you often get bored?

YES

Are you in good spirits most of the time?

Are you afraid that something bad is going to happen to you?

YES

Do you feel happy most of the time?

Do you often feel helpless?

YES

Do you prefer to stay at home, rather than going out and doing things?

YES

Do you feel you have more problems with memory than most?

YES

Do you think it is wonderful to be alive now?

Do you feel pretty worthless the way you are now?

YES

Do you feel full of energy?

Do you feel that your situation is hopeless?

YES

Do you think that most people are better off than you are?

YES

Frequently Asked Questions — GDS-15

Can the GDS-15 be used in patients with dementia?

The GDS-15 has acceptable validity in mild to moderate cognitive impairment (MMSE > 15). In severe dementia, patients cannot reliably self-report mood due to lack of insight and memory impairment. For these patients, the Cornell Scale for Depression in Dementia (CSDD) — an observer-rated scale using informant interview — is preferred. Always supplement the GDS with clinical observation and caregiver interview in any patient with known cognitive impairment.

What is the difference between GDS-15 and GDS-30?

The GDS-30 is the original full 30-item Geriatric Depression Scale (Yesavage, 1983). The GDS-15 (Sheikh and Yesavage, 1986) is a shortened version that selects the 15 items with the highest correlation with depression diagnosis. Both versions have comparable sensitivity and specificity for major depression in older adults. The GDS-15 is preferred in clinical practice due to its shorter administration time (5 vs 10 minutes).

What action should be taken if the GDS-15 score is ≥5?

A score of ≥5 is a screen positive result indicating possible depression and should trigger: (1) a structured clinical interview using DSM-5 criteria for major depressive disorder; (2) medication review for depression-causing agents such as beta-blockers, corticosteroids, opioids, and benzodiazepines; (3) medical workup to exclude thyroid disease and vitamin B12 deficiency; (4) social assessment for isolation, bereavement, and caregiver burden; (5) referral to geriatric psychiatry or psychology for scores ≥9.

Why is the GDS preferred over the PHQ-9 in older adults?

The PHQ-9 includes somatic symptoms — sleep, appetite, fatigue, psychomotor changes — that are commonly caused by medical conditions rather than depression in older adults, potentially inflating scores. The GDS avoids somatic items entirely, focusing on psychological and social dimensions of depression. The GDS is therefore more specific for depression in medically complex older patients and is the recommended first-line screening tool in geriatric populations.

Is the GDS-15 valid for patients with mild cognitive impairment?

Yes. The GDS-15 retains acceptable sensitivity and specificity in patients with mild cognitive impairment (MCI) and mild dementia, provided the patient can understand and answer simple yes/no questions. Studies have confirmed its validity in patients with MMSE scores above 15. For patients with MMSE below 15 or moderate-to-severe dementia, the Cornell Scale for Depression in Dementia is a more appropriate instrument.

How often should the GDS-15 be repeated for monitoring?

For patients with a positive screen (score ≥5), repeat assessment at 4–6 weeks after initiating any intervention — pharmacological, psychological, or social — to monitor treatment response. For patients receiving antidepressant therapy, reassessment at 6–8 weeks aligns with typical medication onset timelines. In long-term care settings, routine administration every 3–6 months is recommended as part of comprehensive geriatric assessment.

What is the GDS-15 cut-off score and what does it mean?

The standard cut-off score is ≥5, at which the GDS-15 achieves sensitivity of 92% and specificity of 89% for major depressive disorder in adults aged 65 and older. A score of ≥5 is considered screen positive and warrants a full clinical diagnostic interview. The cut-off does not constitute a diagnosis — it indicates that further clinical evaluation is required.

References

1. Yesavage JA, Brink TL, Rose TL, et al.
Development and validation of a geriatric depression screening scale: a preliminary report.
Journal of Psychiatric Research. 1983;17(1):37–49.
PubMed: 7183759

2. Sheikh JI, Yesavage JA.
Geriatric Depression Scale (GDS): recent evidence and development of a shorter version.
Clinical Gerontologist. 1986;5(1–2):165–173.
DOI: 10.1300/J018v05n01_09

3. Friedman B, Heisel MJ, Delavan RL.
Validity of the SF-36 five-item Mental Health Index for major depression in functionally impaired, community-dwelling elderly patients.
American Journal of Geriatric Psychiatry. 2005;13(7):596–606.
PubMed: 16009737

4. Almeida OP, Almeida SA.
Short versions of the geriatric depression scale: a study of their validity for the diagnosis of a major depressive episode according to ICD-10 and DSM-IV.
International Journal of Geriatric Psychiatry. 1999;14(10):858–865.
PubMed: 10521885

The GDS-15 is in the public domain. No licensing or copyright permission is required for clinical or research use.

Geriatric Depression Scale (GDS-15) — Validated Depression Screen for Older Adults

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