For people with drug & alcohol problems

Your Guide to Rehab: Why it’s necessary and why it could save your life.

Success Rates

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Success Rates of Residential Rehab Treatment

Residential rehab and addiction treatments are dependent on scientific research and study in order to help guarantee the most effective and successful methods.

It is vital to follow the latest developments and research in the industry to ensure that treatment is research-led and is best suited to the individual human experience.

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Here at the Executive Rehab Guide, we understand how important it is to know how successful rehab can be, and what your chances of recovery are.

For professional, confidential and impartial advice, call our 24/7 helpline today on 0808 1150 446.

Success rates of residential rehab in 2021

In more recent studies, there is very strong evidence to suggest that longer periods of addiction treatment and residential rehab are most successful in long-term recovery.

A new study, which was published recently in the Open Journal of Psychiatry, found that longer rehab programmes led to an improvement in patients’ long-term recovery.

Those in longer addiction treatment programmes had a success rate of 84%.

The importance of consistent data collection:

Castle Craig remains one of the most successful UK residential rehab hospitals due to the fact it conducts a significant amount of research internally.

Their treatment outcome studies also show evidence that longer and more well-rounded addiction recovery programmes are the most successful.

Longer treatment programmes are considered to be so effective because they give patients time to detox, and build the tools they need for relapse prevention and tackling withdrawal.

These will be carried over into an aftercare plan too.

There will also be enough time for patients to see the benefits of individual and group sessions, behavioural and holistic therapies.

Want to know more about how residential rehab works? Read more.

Long-term proven success rates:


An important study in 1995 was the National Treatment Outcome Research Study (NTORS) published by the Department of Health.

The researchers recruited 1,075 former patients who received addiction treatment in the UK.

The study demonstrated that:

  • 47% of patients treated in residential rehabilitation services achieved abstinence after five years compared to 35% of those in community-based services.
  • Clients who attended residential rehab made “some of the greatest treatment gains.”

It is interesting to note that in this particular study, those receiving a methadone prescription as a drug substitute are described as ‘abstinent’.

Drug Outcome Research Study (DORIS) [2]

The 2006 DORIS study measured 1,033 drug users from Scotland 3 years post-treatment.

The aim was to see whether they had managed to be abstinent for at least 90 days after leaving residential rehab.

The results showed that:

  • Those who had attended residential rehab services were abstinent over 4 times more likely to remain abstinent compared to individuals receiving community-based services only.
  • Those who were admitted to residential treatment at any point since the start of the trial were 10 times more likely to remain abstinent for 90 days at follow-up check-ups compared to those who had received methadone maintenance.

The evidence from this study also confirms that quality residential treatment can help improve mental and physical health, reduce offending, improve employability and enhance social functioning.

Is residential rehab a key factor in abstinence? [3]

In 2008, Dr David Best [4] and his team of researchers followed 269 people in full (abstinent) recovery.

They concluded that: “The only type of formal treatment service which was a key factor in helping drug users to stay abstinent was residential rehab.”

How effective are 12 Step Rehab Programmes?

Many researchers see 12-Step groups as an essential and effective addiction treatment method.

There are over 2 million members of Alcoholics Anonymous (AA) worldwide.

AA has played a unique role in helping people to recover from dependence and has become the prototype for other similar self-help groups such as Narcotics Anonymous (NA), Cocaine Anonymous (CA), and Overeaters Anonymous (OA).

If you are struggling with addiction get in touch today on 0808 1150 446.

Last Updated on December 6, 2021 by Alison