Lifestyle Coaching Matches CBT, Then Hits a Payment Wall

267 adults with moderate-to-severe depression or bipolar disorder completed an eight-week remote course on diet, exercise, sleep and alcohol. A blinded rater then scored them on the 60-point Montgomery-Asberg Depression Rating Scale, and the lifestyle arm fell by 8.55 points, against 6.82 points for remote cognitive behavioural therapy.

That 1.73-point gap is an average, not proof that food and movement beat a therapist. Adrienne O’Neil of Deakin University’s Food and Mood Centre, who led the work, said the team had shown non-inferiority, not routine superiority. The people who ran the stronger-looking arm were accredited dietitians and exercise physiologists. In Australia they still cannot bill a mental health care plan for that job.

An Eight-Week Zoom Course Matched Short CBT

About 1 in 20 adults worldwide have depression. A 2021 evidence review found that more than half of people do not respond to therapy. O’Neil’s protocol also notes that antidepressant response can sit as low as 30 to 50 percent in unipolar depression, and around 30 percent for lithium in bipolar depression, which is why her group has spent five years testing another delivery path.

The new comparison is HARMON-E, a national, remotely delivered, non-inferiority trial. Adults had to score 20 or higher on the MADRS, meet criteria for a major depressive episode on a structured clinical interview, and live anywhere in Australia. Both arms were add-ons to usual care, including medicines already prescribed.

Each person got one individual session plus six group meetings over eight weeks, in groups of 4 to 10, on video. Session length, time of day and how facilitators contacted people were matched. Only the content and the clinicians changed. Lifestyle was co-led by a dietitian and an exercise physiologist. CBT was led by two psychologists. Research assistants who collected scores did not know the assignment.

The protocol set the bar in advance. If lifestyle came within 1.6 MADRS points of CBT, the two would be treated as comparably effective. That 1.6-point cut is the usual minimum for a change a patient might feel. The lifestyle mean dropped 1.73 points more than CBT, so it cleared the bar from the other side. Self-reported depression held at 16- and 24-week follow-up. Cost figures for this trial are still being worked up.

FROM CALM TO HARMON-E

1. May 2021 to April 2022: CALM recruits 182 adults with elevated distress in regional Victoria for a six-session Zoom comparison of diet and movement versus group CBT.
2. 22 July 2022: Investigators lodge the HARMON-E trial registration to test the same idea in diagnosed mood disorder.
3. September 2022: HARMON-E recruitment opens across all eight Australian states and territories, aiming for 378 people, 189 in each arm.
4. 31 July 2024: CALM results appear, with lifestyle non-inferior to psychotherapy on PHQ-9 scores.
5. 3 October 2024: The HARMON-E protocol is published in BMC Psychiatry, with MADRS as the primary eight-week outcome.
6. 23 September 2026: Briefed results from 267 adults show the 8.55-point versus 6.82-point MADRS drops.

The 267 figure is the sample in the briefed results. The protocol had planned 378. Those are different counts, not a clash: one is who was analysed in the public readout, the other is the original target.

Dietitians and Exercise Physiologists Ran That Arm

HARMON-E was built to answer a charge CALM could not. CALM enrolled people with raised distress, not a confirmed mood-disorder diagnosis, and it focused on food and movement. HARMON-E required moderate-to-severe symptoms, included bipolar depression, and added sleep and substance use. O’Neil has said accredited practising dietitians and exercise physiologists are well placed to help provide mental health care.

The lifestyle curriculum had four pillars, co-facilitated rather than handed out as a leaflet.

THE FOUR PILLARS IN THE LIFESTYLE ARM

• Diet: Mindful eating and food quality, delivered by an accredited practising dietitian, not generic calorie advice.
• Movement: Finding forms of exercise a person might actually keep, led by an accredited exercise physiologist.
• Sleep: Sleep-hygiene work that CALM did not treat as a core pillar.
• Substances: Alcohol, smoking and other drug use, the other addition beyond the 2024 course.

Ashwini Nadkarni at Harvard Medical School, who was not on the trial team, said lifestyle can move depression through inflammation, stress and neuroplasticity, the way brain circuits reorganise, and through neurotransmitter metabolism and the gut microbiome. Patricia Dixon, a clinician at Manatee Associates of Counseling and Assessment in Palmetto, Florida, who also was not involved, put the practical case more simply.

Each positive change begets another, so this approach may be helping people build a healthier platform for their lives.

Patricia Dixon, clinician, Manatee Associates of Counseling and Assessment

After CALM, the Food and Mood Centre began short courses through its Food and Mood Academy so dietitians and exercise physiologists could pick up mental health skills. HARMON-E is the test of whether that workforce can hold its own with psychologists when the diagnosis is heavier.

What the MADRS Numbers Showed

Read the two Deakin trials as a pair and the pattern is the same shape on two different rulers. CALM used the PHQ-9 and a two-point non-inferiority margin. HARMON-E used a clinician-rated MADRS and a 1.6-point margin. Both were eight weeks, remote, and group-based.

TWO DEAKIN TRIALS, TWO SCALES

CALM’s intention-to-treat numbers were close: a 4.42-point PHQ-9 drop for lifestyle (n=91) and 3.82 for psychotherapy (n=91). People completed 4.2 of 6 sessions on average. Three serious adverse events were logged. Delivery of lifestyle cost less; once lost work and other bills were folded in, total costs did not differ. The health-sector gap was AUD$156 in the per-protocol set and AUD$190 in intention-to-treat, with confidence intervals that crossed zero.

HARMON-E’s 8.55 versus 6.82 split is larger in raw points because MADRS runs to 60, not 27. O’Neil has been careful not to sell it as a win. Averages can hide people who did not move. The briefed follow-up also switches instrument: the 16- and 24-week hold is self-reported depression, not the blinded MADRS used at eight weeks.

Five Medicare Visits Do Not Cover This Care

If the clinical claim stands, the bottleneck is a billing code. Australians with a GP chronic condition management plan can claim five subsidised allied health visits a year, shared across 13 professions that include dietitians (item 10954) and exercise physiologists (item 10953). Those five visits are for chronic disease, and they are often already spoken for by podiatry or physiotherapy.

Mental health care plans, the route that subsidises psychologists, do not list dietitians or exercise physiologists for depression. Eating disorders are the mental health condition with a dedicated dietetic item. From 1 July 2025, accredited dietitians and exercise physiologists were added to Medicare items for complex neurodevelopmental disorders such as autism, and for some disabilities. Depression was not in that update. Peak bodies have asked for years to put them on mental health plans. HARMON-E is the first rater-blinded, moderate-to-severe comparison they can point to.

WHAT WE KNOW

• Chronic-disease cap: Five allied health services a calendar year, face to face, at least 20 minutes, after a GP plan.
• Mental health plans: Psychologist sessions are subsidised; dietitian and exercise physiologist sessions for depression are not.
• CALM money: Lifestyle was cheaper to deliver and no more expensive in total than group CBT in the 182-person trial.

WHAT IS UNCONFIRMED

• HARMON-E costs: O’Neil said the team is still analysing whether the larger trial is cheaper for the health system.
• A Medicare change: No decision has been announced to add depression to the allied health mental health list.

Training time is part of the pitch. A Conversation piece by O’Neil and colleague Sophie Mahoney after CALM put the cost of training a dietitian below that of a psychologist and noted it takes less time. That is an input argument, not a patient bill. Until the mental health plan moves, a GP who believes HARMON-E can still only send someone to a dietitian if a chronic-disease slot is free, or if the patient pays.

Dixon Warns Against Dropping Therapy for Grief

The trial does not say throw out the psychologist. Dixon, commenting on the new results, said people already in CBT should not stop without talking to their doctor. She also flagged a group the four-pillar script is a poor match for: depression tied to life events such as bereavement, where a sleep plan and a shopping list may not reach the cause.

HARMON-E also mixed unipolar and bipolar depression in one analysis. That is a feature of the design, not a bipolar-only win. People stayed on their usual medicines. The honest clinical use, if systems ever fund it, is as another eight-week option on a wait list, or as a partner to CBT and tablets, which is how O’Neil has described it.

A later look at CALM adds a caution the new briefing does not. At nine months, both CALM arms were still below their starting PHQ-9 scores (3.76 points down for lifestyle, 3.24 for psychotherapy). In the complete-case slice, the lifestyle arm sat 2.68 points higher, meaning worse, than psychotherapy. Nutrition habits held. Life stress and physical illness were the barriers people named. HARMON-E’s 16- and 24-week self-report is shorter than that nine-month check, and it is a different questionnaire.

UK Guidance Lists Exercise as Wellbeing Advice

This is not the first time a guideline has mentioned a walk. NICE’s 2022 adult depression guideline already tells clinicians to take diet, activity and sleep into the first assessment. In the treatment pages it says people should be told that regular physical activity to lift wellbeing, including walking, jogging, swimming, dance or gardening, and that a healthy diet, less alcohol and enough sleep may help them feel better. Those lines sit under activities to help wellbeing. They are not a funded eight-week course led by a dietitian, and they are not ranked with group CBT for less severe depression or with combined CBT and an antidepressant for more severe illness.

A World Federation of Societies for Biological Psychiatry taskforce, working with the Australasian Society of Lifestyle Medicine, has gone further, calling diet, exercise, sleep and substance cessation a core part of care for major depression, in line with Royal Australian and New Zealand College of Psychiatrists language on lifestyle as foundational. RANZCP mood guidance already tells doctors to encourage a balanced diet, exercise and sleep hygiene before they reach for a prescription. The missing piece has been a head-to-head with therapy in people who are quite unwell. HARMON-E was designed as that piece.

Guidelines that nod to walking still leave the psychologist as the person the public system pays. That is why a MADRS result from Geelong lands on a workforce argument. If lifestyle matches an eight-week remote CBT product, health services can, in theory, use a larger allied health pool. If they do not change who can bill, the result stays in a journal.

Children With Anxiety Are Next in Line

O’Neil’s group is already rewriting the course. A CALM-Kids grant runs from 1 July 2025 to 30 June 2027 to test family-based lifestyle therapy against a placebo control for child anxiety. The same team has said it is adapting the work for veterans with mental health conditions. Those studies will not inherit the 8.55-point figure. Children and veterans are different bodies, different days, different payers.

For adults on a wait list now, the usable fact is narrower. An eight-week, group, video programme run by a dietitian and an exercise physiologist matched short remote CBT on a blinded depression scale in 267 people with moderate-to-severe symptoms, including bipolar disorder, while they kept their usual care. The same professions cannot yet claim that work under an Australian mental health care plan. Dixon’s limit still applies: if the depression is grief, keep the therapist in the room.

Frequently Asked Questions

What is the Montgomery-Asberg Depression Rating Scale?

The MADRS is a 10-item, clinician-rated scale that totals 60 points. HARMON-E used a score of 20 or higher as the door for moderate-to-severe symptoms, and a 1.6-point gap as the smallest change treated as clinically meaningful, which is why that number became the non-inferiority margin.

How did the 2024 CALM trial differ from HARMON-E?

CALM took 182 adults with a Distress Questionnaire-5 score of 8 or more, a screen for raised distress, not a SCID mood-disorder diagnosis, and it ran six group sessions on diet and movement only. HARMON-E required a recent major depressive episode, mixed in bipolar disorder, added sleep and substance use, and used a blinded MADRS instead of the PHQ-9.

Is lifestyle therapy meant to replace antidepressants?

No. Both CALM and HARMON-E were built as add-ons. People already on tablets or seeing another clinician kept that care, and the lifestyle arm was tested against an eight-week remote CBT product, not against a full course of medicine withdrawal.

Who is qualified to deliver this lifestyle programme in Australia?

HARMON-E used accredited practising dietitians, the national credential recognised for dietetic services, and accredited exercise physiologists certified by Exercise and Sports Science Australia. Those are the same titles that can already bill chronic-disease Medicare items 10954 and 10953, which is why the mental health plan omission is a policy choice, not a lack of a workforce name.

Did the CALM gains last past eight weeks?

At nine months both CALM arms were still below baseline on the PHQ-9, but in the complete-case group the lifestyle arm scored 2.68 points higher than psychotherapy, a worse score, with life stress and physical illness named as the main barriers to keeping the new habits.

Disclaimer: This article is news reporting on a clinical trial and related payment rules. It is for information only and is not medical advice, a diagnosis, or a treatment plan, and it does not tell anyone to start, stop, or swap therapy, medicine, diet, or exercise. Speak with a qualified doctor, psychiatrist, or psychologist before changing care for depression or bipolar disorder. Figures and billing rules reflect the cited trial protocol, trial results, and Medicare schedules as published and can change.