Spinemathema podcast · Episode 9 · About 8 minutes · October 2026

Episodes are narrated using an AI model of Mr Sadek’s own voice, from scripts he has written and approved.

Read the full article with references: Spinal Fusion or Intensive Rehabilitation for Chronic Back Pain? The MRC Spine Stabilisation Trial

Transcript

Hello and welcome to the Spinemathema podcast. I’m Ahmed Sadek, a neurosurgeon. In this episode I’d like to talk about a British trial that asked a big question for people living with long-standing back pain. Is spinal fusion surgery any better than an intensive rehabilitation programme?

Chronic low back pain means pain that has gone on for months or years. It’s one of the most common reasons people see their doctor, and it can affect work, sleep, mood and relationships. For some people with long-standing pain and wear-related changes on their scans, surgeons have offered a spinal fusion. That means joining two or more vertebrae together so that the painful segment no longer moves.

When this trial was planned in the nineteen nineties, the evidence for fusion in chronic back pain was surprisingly thin. A review published in nineteen ninety nine had found no randomised trials at all. At the same time, rehabilitation programmes combining exercise with psychological support were being recommended for chronic pain. So the Medical Research Council, or MRC, funded a trial to compare the two head to head. It’s known as the MRC Spine Stabilisation Trial, and it was published in the British Medical Journal in two thousand and five.

How did it work? Between nineteen ninety six and two thousand and two, three hundred and forty nine people were recruited from fifteen hospitals across the United Kingdom. Everyone was aged between eighteen and fifty five, had had low back pain for more than a year, and had been judged by their surgeon to be a candidate for fusion. People only joined if both they and their surgeon were genuinely unsure which treatment would be better.

One hundred and seventy six people were assigned to surgery, and one hundred and seventy three to rehabilitation. The surgeons chose which operation to do. Most were fusions, though about one in six were a flexible stabilisation technique.

The rehabilitation programme was quite intensive. It ran every weekday for three weeks, usually around seventy five hours in total, with follow-up sessions afterwards. It was led by physiotherapists, usually with a clinical psychologist as part of the team. It combined tailored exercise, stretching, fitness work and, in most centres, hydrotherapy, with an approach based on cognitive behaviour therapy. That part focused on recognising and overcoming the fears and unhelpful beliefs that many people develop when they’ve been in pain for a long time.

The researchers looked at two main measures after two years. The first was the Oswestry Disability Index, a questionnaire scoring how much back pain gets in the way of daily life, from nought to one hundred, where higher means more disability. The second was the shuttle walking test, which measures how far someone can walk as the pace gradually increases.

So, what did they find? Both groups got better. In the surgery group, the average disability score fell from about forty six and a half to thirty four. In the rehabilitation group, it fell from about forty five to thirty six. After allowing for where people started, surgery came out four point one points better. That difference was statistically significant, but only just. The trial had been designed to detect a difference of four points, so it barely cleared the bar, and the authors themselves described the gap as small given the risks and extra cost of surgery.

On the walking test, there was no significant difference: about three hundred and fifty two metres after surgery and three hundred and ten metres after rehabilitation. There was no significant difference in general physical or mental health scores either.

What about safety and cost? Nineteen people in the surgery group had complications, such as a tear in the lining around the nerves, heavy bleeding or problems with the implants. Eleven needed further operations on the lower spine within two years. No specific complications were found with rehabilitation. A cost analysis published alongside the trial put the average cost at about seven thousand eight hundred pounds per patient for surgery and about four and a half thousand pounds for rehabilitation.

One more number matters here. By two years, forty eight people in the rehabilitation group, about twenty eight percent, had gone on to have surgery anyway. You can look at that two ways. Some people weren’t satisfied with rehabilitation. But nearly three quarters of those assigned to rehabilitation avoided an operation.

And the longer term? A later study combined long-term follow-up from this trial and two others, with an average of more than eleven years after treatment. It found no meaningful difference in disability between those assigned to fusion and those assigned to rehabilitation. Only about half of the patients took part in that follow-up, though, so it should be read with some caution.

Let me be honest about the limitations. Recruitment was slower than planned, and a fifth of patients were missing at two years, although the researchers used statistical methods to check this and got similar answers. More than a quarter of the rehabilitation group crossed over to surgery, which blurs the comparison. The therapists assessing patients knew which treatment they’d had. Surgeons used a mix of operations. And only patients whose surgeon was unsure were included, so some surgeons might argue the people most likely to do well with fusion were never offered the trial. The trial is also now more than twenty years old, and both surgery and rehabilitation have moved on.

So what does it mean for you? This trial suggests that for many people with long-standing low back pain, a well-run intensive rehabilitation programme can achieve results close to those of a fusion, without the risks of an operation. The National Institute for Health and Care Excellence, or NICE, now advises that spinal fusion should not be offered for low back pain except as part of a research trial.

Bear in mind that this trial was about back pain itself. It doesn’t apply to leg pain from a trapped nerve, such as sciatica, or to spinal stenosis, where surgery is judged quite differently.

If you’re thinking about surgery for back pain, good questions to ask include: is my main problem back pain, leg pain, or both? Have I had a proper trial of structured exercise and support with coping? What benefit could I realistically expect from surgery, and what are the risks? And what would happen if I chose not to have an operation?

And please remember: if back pain ever comes with numbness around your bottom or genitals, new trouble passing urine or controlling your bowels, or rapidly worsening weakness in your legs, seek urgent medical help, because these can be signs of cauda equina syndrome.

This podcast is general information only and isn’t a substitute for advice about your own situation, so please speak to your own doctor. You’ll find the full article, with diagrams and all the references, at spinemathema dot com. And if you’ve found this useful, please subscribe to our channel on YouTube. Thank you for listening.

This podcast is general information and is not a substitute for advice about your own situation. Please speak to your GP or specialist.