What is the scientific and clinical evidence for the effectiveness of residential group activities and therapies in treating depression?/Day Hospital and Partial Hospitalisation

Summary

Day hospital and partial hospitalisation programmes offer intensive, structured group-based treatment during daytime hours while patients return home in the evenings. The evidence consistently shows that for appropriately selected patients with depression, day hospital outcomes are equivalent to full inpatient admission — with the advantages of lower cost (20–37% less), greater patient satisfaction, and better continuity with community life. Two major systematic reviews spanning 27 studies and multiple individual studies support this conclusion.

However, day hospital is not appropriate for all patients: those with severe depression, acute suicide risk, or significant somatic co-morbidity may require full inpatient admission.

Major Systematic Reviews

These are covered in detail on the Systematic Reviews page. Key findings in summary:

Marshall et al. (2001): 9 RCTs, 1,568 patients. Day hospital feasible for 23–38% of those currently admitted. Faster mental state improvement (p=0.002). No difference in readmission. 20–37% cheaper.
Horvitz-Lennon et al. (2001): 18 studies. No outcome differences on psychopathology, social functioning, family burden, or service use. Patient/family satisfaction favoured partial hospitalisation.

Inpatient vs Day Hospital for Depression: The INDDEP Study

Zeeck et al. (2015)

Reference: Zeeck A, von Wietersheim J, Weiß H, Eduard Scheidt C, Völker A, Helesic A, Eckhardt-Henn A, Beutel M, Endorf K, Knoblauch J, Rochlitz P, Hartmann A. Symptom course in inpatient and day clinic treatment of depression: Results from the INDDEP-Study. J Affect Disord. 2015;187:35–44. DOI

This is the most directly relevant study comparing inpatient and day hospital treatment specifically for depression:

Naturalistic design with 604 consecutive patients with major depression treated in German psychosomatic hospitals
Both settings provided multimodal psychotherapy — a combination of individual and group therapy, creative therapies, body-oriented therapy, and pharmacotherapy
Patients assessed at admission, discharge, and 3-month follow-up
Primary outcome: reduction in depressive symptomatology (QIDS-C)
Secondary outcomes: overall functioning and quality of life

Key findings:

Inpatients were more severely depressed and more physically impaired at baseline
Inpatients more often received antidepressant medication
Inpatients were treated significantly longer, driven by a subgroup with somatic co-morbidity
After matching for known predictors of outcome, there were NO significant differences in effectiveness between inpatient and day hospital treatment
Most patients with depression can be treated in either setting

Clinical implication: For patients with more severe depression and somatic co-morbidity, inpatient treatment may be preferred. But for the majority of depressed patients, day hospital treatment is equally effective.

Other Comparative Studies

Russell et al. (1996): Acute Day Hospital

Reference: Russell V, Mai F, Busby K, Attwood D, Davis M, Brown M. Acute day hospitalization as an alternative to inpatient treatment. Can J Psychiatry. 1996;41(10):629–637. DOI

Compared acute day hospital (ADH) patients to matched inpatients
ADH patients showed significant clinical improvement in GAF scores, psychological distress, depression, and anxiety at discharge relative to admission
No significant group differences in outcomes between ADH and inpatient settings

Guydish et al. (1998, 1999): Day vs Residential for Substance Use

Reference: Guydish J, Werdegar D, Sorensen JL, Clark W, Acampora A. Drug abuse day treatment: a randomized clinical trial comparing day and residential treatment programs. J Consult Clin Psychol. 1998;66(2):280–289. DOI

188 clients entering a therapeutic community programme randomly assigned to day or residential conditions
18-month follow-up showed no significant differences in outcomes between day and residential groups
Provides evidence that day treatment can substitute for residential treatment in SUD populations (relevant to co-morbid depression)

Partial Hospitalisation for Specific Populations

Bateman and Fonagy (1999): Borderline Personality Disorder

Reference: Bateman A, Fonagy P. Effectiveness of partial hospitalization in the treatment of borderline personality disorder: a randomized controlled trial. Am J Psychiatry. 1999;156(10):1563–1569. DOI

RCT comparing psychoanalytically oriented partial hospitalisation to standard psychiatric care for BPD
Partial hospitalisation group showed significantly lower depression scores (BDI: RR ≥14 = 0.52, 95% CI 0.34–0.80, NNT=3)
Also lower anxiety scores, fewer suicidal acts, and reduced service utilisation
While this study focused on BPD, the depression outcome data supports the relevance of day programmes for depressive symptoms

Cochrane Review (Binks et al. 2006)

Reference: Binks CA, Fenton M, McCarthy L, Lee T, Adams CE, Duggan C. Psychological therapies for people with borderline personality disorder. Cochrane Database Syst Rev. 2006;(1):CD005652. DOI

Included the Bateman & Fonagy study and confirmed that depression and anxiety scores were generally lower in the psychoanalytically oriented partial hospitalisation group

Day Hospital Group Programmes

Rosie et al. (1995): Intensive Psychodynamic Group-Oriented Milieu

Reference: Rosie JS, Azim HF, Piper WE, Joyce AS. Effective psychiatric day treatment: historical lessons. Psychiatr Serv. 1995;46(10):1019–1026. DOI

Described a day treatment programme providing 4 months of intensive psychodynamic group-oriented milieu treatment
Target population: patients with long-standing personality disorders who commonly experience recurrent major depression, dysthymia, and excessive anxiety
Programme demonstrated effectiveness in this population
Provides a model for how structured group activities and therapies can be integrated in a day treatment format

Cost-Effectiveness Considerations

The consistent finding across studies is that day hospital and partial hospitalisation are substantially cheaper than full inpatient admission — typically 20–37% less expensive — while achieving equivalent outcomes. This has important implications for health system design:

Day hospitals can serve as step-down from inpatient care or step-up from outpatient care
They maintain the benefits of structured group programming and therapeutic milieu while avoiding the disruption and cost of full residential admission
For health systems with long inpatient waiting lists, day hospitals represent a cost-effective alternative for many patients

Synthesis

Day hospital outcomes are equivalent to inpatient outcomes for appropriately selected depressed patients
Most patients with depression can be treated in either setting
Day treatment is 20–37% cheaper
Patient and family satisfaction is higher with day/partial hospitalisation
Inpatient admission remains appropriate for the most severely ill, those with suicide risk, and those with significant somatic co-morbidity
Day hospital programmes typically include a mix of group psychotherapy, structured activities, and medication management — the same components as inpatient programmes — suggesting that 24-hour residence is not the critical ingredient for most patients