What is the BDRS used for?

The Bipolar Depression Rating Scale is used to measure the severity of depressive symptoms in people with bipolar disorder. Clinicians use it to assess a current episode, track response to treatment over time, and detect mixed features such as irritability and agitation that general depression scales often miss.

How many items are on the BDRS?

The BDRS has 20 clinician-rated items. Fifteen cover psychological and somatic depressive symptoms, and five form a mixed-symptoms subscale capturing irritability, lability, increased motor drive, increased speech, and agitation. Each item is scored from 0 to 3, giving a total between 0 and 60.

What is a normal BDRS score?

The BDRS does not have official severity bands or a published remission cutoff. Higher totals indicate greater symptom burden, and change across repeated ratings is usually more informative than any single number. Interpret scores alongside clinical history and examination rather than as a fixed threshold.

How is the BDRS different from other depression scales?

Unlike general scales such as the PHQ-9 or MADRS, the BDRS was designed specifically for bipolar depression. It includes a dedicated mixed-symptoms subscale, so it captures activation features like irritability and increased motor drive that unipolar depression measures typically overlook.

Who can administer the BDRS?

The BDRS is a clinician-administered instrument, so a trained rater such as a psychiatrist, psychologist, or mental health clinician completes it. Raters should follow the published scoring anchors in the BDRS rater manual to keep results consistent across visits and between different clinicians.

How often should the BDRS be repeated?

Frequency depends on clinical need. Many clinicians establish a baseline, then re-administer at regular intervals, such as monthly or at each visit, to monitor treatment response. Consistent timing makes score changes easier to interpret and helps distinguish real improvement from week-to-week variation.

Bipolar Depression Rating Scale | Template & auto-scoring

The Bipolar Depression Rating Scale (BDRS) is a 20-item clinician-rated instrument that measures the severity of depressive symptoms in people with bipolar disorder. Unlike general depression scales, it captures atypical and mixed features such as irritability, lability, and increased motor drive, giving clinicians a fuller picture of bipolar depression and its response to treatment over time.

Why healthcare providers use the BDRS

Captures mixed features. A dedicated set of mixed-symptoms items flags irritability and agitation that standard depression scales overlook.
Specific to bipolar depression. It was designed for the depressive phase of bipolar disorder rather than unipolar depression.
Tracks treatment response. Repeat administration shows whether symptoms are improving, stable, or worsening over time.
Supports structured assessment. A consistent 20-item framework guides clinical decision-making across visits and clinicians.

Which settings use the BDRS?

Psychiatric clinics. Mood disorder specialists use it during assessment and follow-up of bipolar disorder.
Research and clinical trials. Investigators use it as an outcome measure in studies of bipolar depression.
Inpatient units. Staff track symptom change during acute mood episodes.
Community mental health. Teams monitor stability between scheduled appointments.

What does the BDRS measure?

The BDRS rates 20 clinician-scored items covering the psychological and somatic symptoms of depression alongside a distinct set of mixed, activation-type symptoms. Because the instrument is copyrighted, the domains are described here rather than the individual items.

Psychological depression. Items covering low mood, anhedonia, hopelessness, worthlessness, guilt, and suicidal ideation.
Somatic depression. Items covering sleep, appetite, energy, motivation, and concentration disturbance.
Mixed symptoms. Five items covering irritability, lability, increased motor drive, increased speech, and agitation.

Scoring the BDRS

Number of items: 20 clinician-rated items.
Per-item scale: each item is scored 0 (nil) to 3 (severe).
Total score range: 0 to 60.
Score direction: higher scores indicate more severe depression.

The BDRS supports, and does not replace, clinical judgment. Scores guide clinical decision-making and should be interpreted alongside history, examination, and the mixed-symptoms items, which may point to a mixed or activated presentation rather than depression alone.

The BDRS does not have official, validated severity bands or a published remission cutoff. The original validation study reported strong correlation with the Montgomery-Asberg and Hamilton depression rating scales, and higher totals reflect greater symptom burden, but fixed severity categories are not established. Interpret the total as a continuous measure of change rather than a threshold, and consider further assessment when scores are high or rising.

Best practices for administration

Use a trained rater. The BDRS is clinician-administered and assumes familiarity with each item's anchors.
Follow the rater manual. Apply the published scoring anchors consistently so results stay comparable over time.
Rate the recent period. Assess symptoms over the defined recent window rather than a single moment.
Re-administer on a schedule. Repeat at consistent intervals to track change reliably.
Review the mixed items. Note activation symptoms that may signal a mixed state alongside depression.

How Zentake helps with the BDRS

Automatic scoring. Zentake totals the 20 items on submit, so there is no hand-tallying.
Longitudinal tracking. Re-send the BDRS on a schedule and view change over time to monitor treatment response.
Risk flagging. Concerning responses, including the suicidal ideation item, are surfaced to your staff for review.
Before the visit. Your team at mental health practices can prepare the BDRS ahead of the appointment, with results ready before the visit.
HIPAA compliant. Data is encrypted, with a signed BAA on every plan.

References

Berk M, Malhi GS, Cahill C, et al. The Bipolar Depression Rating Scale (BDRS): its development, validation and utility. Bipolar Disorders. 2007;9(6):571-579. This is the primary validation source for the 20-item scale and its scoring.

The BDRS rater manual, published by Barwon Health and Deakin University, provides the item anchors and confirms the 0 to 3 per-item scoring and 0 to 60 total range. No official severity bands or remission cutoff are established in the source literature.

Last updated: August 2026

Bipolar Depression Rating Scale