Cost-effectiveness of problem-solving treatment in comparison with usual care for primary care patients with mental health problems: a randomized trial

Using machine learning to forecast symptom changes among subclinical depression patients receiving stepped care or usual care

BACKGROUND

Subclinical depression (SD) is a mental health disorder characterized by minor depressive symptoms. Most SD patients are treated in the primary practice, but many respond poorly to treatment at the expense of provider resources. Stepped care approaches are appealing for tiering SD care to efficiently allocate scarce resources while jointly optimizing patient outcomes. However, stepped care can be time inefficient, as some persons may respond poorly and be forced to suffer with their symptoms for prolonged periods. Machine learning can offer insight into optimal treatment paths and inform clinical recommendations for incident patients.

METHODS

As part of the Step-Dep trial, participants with SD were randomized to receive stepped care (N=96) or usual care (N=140). Machine learning was used to predict changes in depressive symptoms every three months over a year for each treatment group.

RESULTS

Tree-based models were effective in predicting PHQ-9 changes among patients who received stepped care (r=0.35-0.46, MAE=0.14-0.17) and usual care (r=0.34-0.49, MAE=0.15-0.18). Patients who received stepped care were more likely to reduce PHQ-9 scores if they had high PHQ-9 but low HADS-A scores at baseline, a low number of chronic illnesses, and an internal locus of control.

LIMITATIONS

Models may suffer from potential overfitting due to sample size limitations.

CONCLUSION

Our findings demonstrate the promise of machine learning for predicting changes in depressive symptoms for SD patients receiving different treatments. Trained models can intake incident patient information and predict outcomes to inform personalized care.

Glucose and cholesterol stabilization in patients with type 2 diabetes mellitus with depressive and anxiety symptoms by problem-solving therapy in primary care centers in Mexico City

Aim The aim of this study was to determine if the problem-solving therapy (PST) helps control metabolic variables in patients with type 2 diabetes mellitus (T2DM) who show depressive and anxiety symptoms.

BACKGROUND

T2DM is a chronic-degenerative multifactorial disease. It is considered one of the main public health problems in the world, and it represents an important social and economic burden. It is frequently associated with major depression and anxiety disorders, which are related with high glycated hemoglobin (HbA1c) concentrations and poor metabolic control.

METHOD

We initially included 123 patients diagnosed with T2DM from five primary care centers (PCC) in Mexico City. HbA1c, central glucose, and lipid profile were measured in each patient. In addition, the Kessler psychological distress scale (K-10), the Beck Depression Inventory, and the Beck Anxiety Inventory were applied at the beginning and, to those who continued, at the end of the PST, as well as four months later. Findings In total, 36 patients completed the PST and the follow-up. There was a significant decrease in depressive and anxiety symptoms (P<0.001), as well as in total cholesterol (P=0.002), HbA1c (P=0.05), and low-density lipoprotein (LDL) (P=0.022). The PST helps reduce depressive and anxiety symptoms and may help stabilize glucose and cholesterol up to four months. Further studies on this area are recommended. If our findings are confirmed, the PST could help improve the quality of life of thousands of individuals with psychiatric-metabolic co-morbidity who only visit PCC.

Effectiveness of a stepped-care intervention to prevent major depression in patients with type 2 diabetes mellitus and/or coronary heart disease and subthreshold depression: A pragmatic cluster randomized controlled trial

Purpose

Given the public health significance of poorly treatable co-morbid major depressive disorders (MDD) among patients with type 2 diabetes mellitus (DM2) and coronary heart disease (CHD), we need to investigate whether strategies to prevent the development of major depression could reduce its burden of disease. We therefore evaluated the effectiveness of a stepped-care program for subthreshold depression in comparison with usual care in patients with DM2 and/or CHD.

Methods

A cluster randomized controlled trial, with 27 primary care centers serving as clusters. A total of 236 DM2 and/or CHD patients with subthreshold depression (nine item Patient Health Questionnaire (PHQ-9) score ≥ 6, no current MDD according to DSM-IV criteria) were allocated to the intervention group (N = 96) or usual care group (n = 140). The stepped-care program was delivered by trained practice nurses during one year and consisted of four sequential treatment steps: watchful waiting, guided self-help, problem solving treatment and referral to the general practitioner. The primary outcome was the 12-month cumulative incidence of MDD as measured with the Mini International Neuropsychiatric Interview (MINI). Secondary outcomes included severity of depression (measured by PHQ-9) at 3, 6, 9 and 12 months.

Results

Of 236 patients (mean age, 67,5 (SD 10) years; 54.7% men), 210 (89%) completed the MINI at 12 months. The cumulative incidence of MDD was 9 of 89 (10.1%) participants in the intervention group and 12 of 121 (9.9%) participants in the usual care group. We found no statistically significant overall effect of the intervention (OR = 1.21; 95% confidence interval (0.12 to 12.41)) and there were no statistically significant differences in the course or severity of depressive symptoms between the two groups.

Conclusions

This study suggest that Step-Dep was not more effective in preventing MDD than usual care in a primary care population with DM2 and/or CHD and subthreshold depression.

Economic Evaluation of Mental Health Interventions: A Guide to Costing Approaches

Costing approaches in the economic evaluation of mental health interventions are complicated by the broad societal impacts of mental health, and the multidisciplinary nature of mental health interventions. This paper aims to provide a practical guide to costing approaches across a wide range of care inputs and illness consequences relevant to the treatment of mental health. The resources needed to deliver mental health interventions are highly variable and depend on treatment settings (institutional, community), treatment providers (medical, non-medical) and formats (individual, group, electronic). Establishing the most appropriate perspective is crucial when assessing the costs associated with a particular mental health problem or when evaluating interventions to treat them. We identify five key cost categories (social care, informal care, production losses, crime and education) impacted by mental health and discuss contemporary issues in resource use measurement and valuation, including data sources and resource use instruments.

The effect of nurse-led problem-solving therapy on coping, self-efficacy and depressive symptoms for patients with chronic obstructive pulmonary disease: a randomised controlled trial

OBJECTIVE

to examine the effects of nurse-led, problem-solving therapy (PST) on coping, self-efficacy and depressive symptoms for patients with chronic obstructive pulmonary disease (COPD) using a randomised controlled trial.

SUBJECTS

a total of 254 patients with COPD were recruited, screened and randomly allocated into the intervention group with nurse-led PST or the comparison group with usual care. A total of 151 patients (intervention = 78 and comparison = 73) completed the study for 6 months.

METHODS

the nurse-led PST was an individualised and patient-centred intervention to improve patients' problem-solving skills related to symptom management and lifestyle modification. Twelve telephone-based PST sessions were provided to the intervention group, while the control group received usual care from their primary care providers.

RESULTS

there were no group differences of post-test scores in problem-oriented coping, self-efficacy and depressive symptoms between the two groups. However, despite the lack of group differences, the nurse-led PST was effective for clinically depressed patients with COPD, who experienced decreased depressive symptoms (mean difference = 6.8, P = 0.009) and increased self-efficacy (mean difference = -0.6, P = 0.041) in the intervention group (n = 12).

CONCLUSION

the nurse-led PST offered to patients with COPD did not demonstrate any different effects compared with usual care over 6 months; however, a subgroup analysis with clinically depressed subjects showed improved self-efficacy and decreased depressive symptoms in the intervention group.

Effectiveness of psychological interventions in preventing recurrence of depressive disorder: meta-analysis and meta-regression

BACKGROUND

Major depression is probably best seen as a chronically recurrent disorder, with patients experiencing another depressive episode after remission. Therefore, attention to reduce the risk of relapse or recurrence after remission is warranted. The aim of this review is to meta-analytically examine the effectiveness of psychological interventions to reduce relapse or recurrence rates of depressive disorder.

METHODS

We systematically reviewed the pertinent trial literature until May 2014. The random-effects model was used to compute the pooled relative risk of relapse or recurrence (RR). A distinction was made between two comparator conditions: (1) treatment-as-usual and (2) the use of antidepressants. Other sources of heterogeneity in the data were explored using meta-regression.

RESULTS

Twenty-five randomised trials met inclusion criteria. Preventive psychological interventions were significantly better than treatment-as-usual in reducing the risk of relapse or recurrence (RR=0.64, 95% CI=0.53-0.76, z=4.89, p<0.001, NNT=5) and also more successful than antidepressants (RR=0.83, 95% CI=0.70-0.97, z=2.40, p=0.017, NNT=13). Meta-regression showed homogeneity in effect size across a range of study, population and intervention characteristics, but the preventive effect of psychological intervention was usually better when the prevention was preceded by treatment in the acute phase (b=-1.94, SEb=0.68, z=-2.84, p=0.005).

LIMITATIONS

Differences between the primary studies in methodological design, composition of the patient groups and type of intervention may have caused heterogeneity in the data, but could not be evaluated in a meta-regression owing to poor reporting.

CONCLUSIONS

We conclude that there is supporting evidence that preventive psychological interventions reduce the risk of relapse or recurrence in major depression.

Effectiveness of quality improvement strategies for coordination of care to reduce use of health care services: a systematic review and meta-analysis

BACKGROUND

Frequent users of health care services are a relatively small group of patients who account for a disproportionately large amount of health care utilization. We conducted a meta-analysis of the effectiveness of interventions to improve the coordination of care to reduce health care utilization in this patient group.

METHODS

We searched MEDLINE, Embase and the Cochrane Library from inception until May 2014 for randomized clinical trials (RCTs) assessing quality improvement strategies for the coordination of care of frequent users of the health care system. Articles were screened, and data abstracted and appraised for quality by 2 reviewers, independently. Random effects meta-analyses were conducted.

RESULTS

We identified 36 RCTs and 14 companion reports (total 7494 patients). Significantly fewer patients in the intervention group than in the control group were admitted to hospital (relative risk [RR] 0.81, 95% confidence interval [CI] 0.72-0.91). In subgroup analyses, a similar effect was observed among patients with chronic medical conditions other than mental illness, but not among patients with mental illness. In addition, significantly fewer patients 65 years and older in the intervention group than in the control group visited emergency departments (RR 0.69, 95% CI 0.54-0.89).

INTERPRETATION

We found that quality improvement strategies for coordination of care reduced hospital admissions among patients with chronic conditions other than mental illness and reduced emergency department visits among older patients. Our results may help clinicians and policy-makers reduce utilization through the use of strategies that target the system (team changes, case management) and the patient (promotion of self-management).

Healthcare utilization in general practice before and after psychological treatment: a follow-up data linkage study in primary care

OBJECTIVE

Literature suggests that serious mental health problems increase the use of health services and psychological interventions can reduce this effect. This study investigates whether this effect is also found in primary care patients with less serious mental health problems.

DESIGN/SETTING

Routine electronic health records (EHR) from a representative sample of 128 general practices were linked to patient files from 150 primary care psychologists participating in the NIVEL Primary Care Database, using a trusted third party. Data were linked using the date of birth, gender, and postcode. This yielded 503 unique data pairs that were listed in one of the participating GP practices in 2008-2010, for people who had psychological treatment from a psychologist that ended in 2009.

MAIN OUTCOME MEASURES

The number of contacts, health problems presented, and prescribed medication in general practice were analysed before and after the psychological treatment.

RESULTS

Nearly all 503 patients consulted their GP during the six months preceding the psychological treatment (90.9%) and also in the six months after this treatment had ended (83.7%). The frequency of contacts was significantly higher before than after the psychological treatment (6.1 vs. 4.8). Fewer patients contacted their GPs specifically for psychological or social problems (46.3% vs. 38.8%) and fewer patients had anxiolytic drug prescriptions (15.5% vs. 7.6%) after psychological treatment.

CONCLUSION

After psychological treatment, patients contact their GPs less often and present fewer psychological or social problems. Although contact rates seem to decrease, clients of psychologists are still frequent GP attenders.

Caring for family caregivers: An analysis of a family-centered intervention

Objective To assess the effectiveness of Problem-Solving Therapy (PST) on family caregivers through the use of scales to measure anxiety, depression and emotional distress; and to explore facilitating factors and obstacles for its use based on the narrative of nurses. Method A clinical trial and an exploratory focus group with the use of mixed analysis methodology. The study was conducted in a primary health care center in Tarragona, Spain, and the sample consisted of 122 family caregivers who were included in the home care service, and 10 nurses who participated in the intervention group. Family caregivers with evident symptoms of anxiety, depression and emotional distress received PST in the intervention group. The intervention group also consisted of a discussion with eight nurses, which was transcribed and submitted to content analysis. Conclusion Problem-Solving Therapy proved to be effective in reducing perceived anxiety, depression and emotional distress. We identified its strong points and obstacles as described by nurses.



The estimation of utility weights in cost-utility analysis for mental disorders: a systematic review

OBJECTIVE

To systematically review approaches and instruments used to derive utility weights in cost-utility analyses (CUAs) within the field of mental disorders and to identify factors that may have influenced the choice of the approach.

METHODS

We searched the databases DARE (Database of Abstracts of Reviews of Effects), NHS EED (National Health Service Economic Evaluation Database), HTA (Health Technology Assessment), and PubMed for CUAs. Studies were included if they were full economic evaluations and reported quality-adjusted life-years as the health outcome. Study characteristics and instruments used to estimate utility weights were described and a logistic regression analysis was conducted to identify factors associated with the choice of either the direct (e.g. standard gamble) or the preference-based measure (PBM) approach (e.g. EQ-5D).

RESULTS

We identified 227 CUAs with a maximum in 2009, 2010, and 2012. Most CUAs were conducted in depression, dementia, or psychosis, and came from the US or the UK, with the EQ-5D being the most frequently used instrument. The application of the direct approach was significantly associated with depression, psychosis, and model-based studies. The PBM approach was more likely to be used in recent studies, dementia, Europe, and empirical studies. Utility weights used in model-based studies were derived from only a small number of studies.

LIMITATIONS

We only searched four databases and did not evaluate the quality of the included studies.

CONCLUSIONS

Direct instruments and PBMs are used to elicit utility weights in CUAs with different frequencies regarding study type, mental disorder, and country.

Innovation in health economic modelling of service improvements for longer-term depression: demonstration in a local health community

BACKGROUND

The purpose of the analysis was to develop a health economic model to estimate the costs and health benefits of alternative National Health Service (NHS) service configurations for people with longer-term depression.

METHOD

Modelling methods were used to develop a conceptual and health economic model of the current configuration of services in Sheffield, England for people with longer-term depression. Data and assumptions were synthesised to estimate cost per Quality Adjusted Life Years (QALYs).

RESULTS

Three service changes were developed and resulted in increased QALYs at increased cost. Versus current care, the incremental cost-effectiveness ratio (ICER) for a self-referral service was £11,378 per QALY. The ICER was £2,227 per QALY for the dropout reduction service and £223 per QALY for an increase in non-therapy services. These results were robust when compared to current cost-effectiveness thresholds and accounting for uncertainty.

CONCLUSIONS

Cost-effective service improvements for longer-term depression have been identified. Also identified were limitations of the current evidence for the long term impact of services.