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An alcohol & drug rehab clinic

Treatment Outcomes at Castle Craig

There is a vast body of evidence to show that residential treatment for addictions can enable people to lead drug-free lives. At Castle Craig we strive to provide the highest standard of treatment and the results show that our treatment is effective. Castle Craig has produced several outcome studies over a number of years and these have shown consistently good results.

Effectiveness of Treatment at Castle Craig

Outcomes study for Castle Craig Hospital, 2015

Independent analysis of outcome data, Christo Research Systems 

Our 2015 study used the Christo Inventory for Substance Misuse Services (CISS). This tool is a widely used outcomes tool in the UK.

The questionnaire was sent to 233 patients admitted to Castle Craig between 2011-2012 for alcohol, drug and gambling addictions.  The patients in this study were all from Holland.  75% of patients completed treatment, others prematurely self-discharged against medical advice, a small number were prematurely discharged for rule violations or on medical grounds.

We received a 70.9% response rate (158 of the sample) which showed that:[1]

  • 91.8% of followed-up patients improved, 8% remained the same, none got worse.
  • 73.4% were totally abstinent from all drugs or alcohol at follow-up.
  • 81.6% achieved low problem severity at follow-up. 

Outcomes for cocaine addicted patients at Castle Craig Hospital, 9th May 2007

Independent analysis of outcome data, Christo Research Systems

Our study of cocaine-addicted patients, in 2007, also used the Christo Inventory for Substance Misuse Services (CISS).

Our questionnaire was sent to 89 patients admitted between August 2002 and February 2004 for severe cocaine dependence, and yielded a 75% response rate.

Good outcomes were achieved for these patients despite their high severity of dependence, their severe psychological and physical health problems, poor social functioning and previous attendance at numerous out-patient treatments.

The success rate for the total group of 89 patients (based on the assumption that the 21 patients who didn’t respond to the questionnaire had poor outcomes) showed that:

  • 66% of those who completed treatment at Castle Craig were totally abstinent from all drugs or alcohol at follow-up (after 3-5 years).
  • 46% of those who completed detox (but not necessarily the full treatment programme) were totally abstinent on follow-up.
  • 78% of those questioned achieved low-problem severity.
  • 84% of those questioned showed a reduction in levels of dysfunction.
  • Those patients who entered the Castle Craig extended care programme were significantly more likely to have a good outcome.

The study found that even the treatment ‘failures’ i.e. those who relapsed, still appeared to have benefited from their experience in treatment.

“Castle Craig Hospital appears to be providing a service for very dysfunctional cocaine dependent people with complications from lack of support, poor health, psychological problems, and lack of occupation.

However good outcomes are achieved despite these high levels of dysfunction at intake.”

- G. Christo, BSc, PhD, PsychD.,AFBPsS, CPsychol. 2007

Outcome Study of patients in employment 1999

Dr.R.Hughes

This study analysed a consecutive sample of 96 alcohol dependent people entering treatment who were in employment. The follow-up period was an average of 21 months (6-35 months). Data was obtained from a Castle Craig follow up questionnaire and the response rate was 78%. The results were as follows:

  • 41% had been continually abstinent during the follow up period
  • 19% had a good “outcome” (i.e. they had had a period of continuous abstinence of six months duration prior to follow up)
  • In total 60% of clients were abstinent for at least 6 months prior to follow up. 

Extended Care follow-up study, 1999

Dr. Margaret McCann, MB BCh Medical Director, Castle Craig Hospital

A study in 1999 investigated the results of 96 severely dependent patients who were admitted into the extended care programme after the first phase of treatment was complete. 

The results showed that 62% of those who completed treatment had remained abstinent for a minimum, of 3 months and up to a minimum of 420 days.

Patient Satisfaction at Castle Craig

Between July and December 2015, we surveyed 250 satisfaction questionnaires, which had been filled out by patients leaving treatment.  98% of patients graded their overall stay as good, very good or excellent.

In 2009, Castle Craig surveyed 150 patients from primary stage care and the extended care facility. The overall satisfaction for the service ran at 87% in the Intensive Therapy Unit with the categories of ‘Nursing Care’, ‘Individual Counselling’, ‘Detoxification’, ‘Group Therapy’, and ‘Staff Attitude’ all scoring 90% or more. 

The Extended Care Unit scored 82% overall satisfaction level with Specialised Therapies Individual therapy, Group Therapy and Family Therapy all scoring 90% and above.

“The high level of satisfaction expressed by the patients in this survey indicates that the staff and management of Castle Craig Hospital continue to provide a service which is greatly appreciated by its service users and that Castle Craig Hospital continues to listen to its service users.”

- Lead Quality Assurance Officer, Castle Craig Hospital 

The recommendations from the survey have since been used to further improve and strengthen those areas of service at Castle Craig.



[1]  The following success rates are liberally based (by not including the 75 patients that could not be contacted for follow-up. Some of these missing patients were not contactable due to having recovered and being in full time occupation.)

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