Effectiveness of interventions to improve adherence to antidepressant medication in patients with depressive disorders: a cluster randomized controlled trial

Aim

To assess the effectiveness of two interventions of knowledge transfer and behavior modification to improve medication adherence in patients with depressive disorders.

Methods

An open, multicenter, three-arm clinical trial with random allocation by cluster to usual care or to one of the two interventions. The intervention for psychiatrists (PsI) included an educational program based on a patient-centered care model. The intervention for patients and relatives (PtI) included a collaborative care program plus a reminder system that works using an already available medication reminder application. The primary outcome was patient adherence to antidepressant treatment assessed through the Sidorkiewicz Adherence Instrument. Secondary measures were depression severity, comorbid anxiety and health-related quality of life. Mixed regression models with repeated measures were used for data analysis.

Results

Ten psychiatrists and 150 patients diagnosed with depressive disorder from eight Community Mental Health Units in the Canary Islands (Spain) were included. Compared with usual care, no differences in long-term adherence were observed in either group PsI or PtI. The PsI group had significantly improved depression symptoms (B = -0.39; 95%CI: -0.65, -0.12; p = 0.004) during the follow-up period. The PtI group presented improved depression symptoms (B = -0.63; 95%CI: -0.96, -0.30; p < 0.001) and mental quality of life (B = 0.08; 95%CI: 0.004, 0.15; p = 0.039) during the follow-up period.

Conclusion

The assessed interventions to improve adherence in patients with depressive disorder were effective for depression symptoms and mental quality of life, even over the long term. However, no effect on antidepressant adherence was observed.

Barriers and Facilitating Factors of Adherence to Antidepressant Treatments: An Exploratory Qualitative Study with Patients and Psychiatrists

This study examines the experiences and expectations of patients with depressive disorders regarding the disease and different antidepressants, as well as examining the barriers and facilitating factors that could affect their adherence to medications. An exploratory qualitative study was carried out. The study involved two focus groups made up of patients and caregivers and six semi-structured interviews with psychiatrists. In both cases, the participants were selected by intentional theoretical sampling, seeking maximum significance variation of social types. Prejudice about the side effects of medication was relevant. The importance of patients being well informed about the disease/treatments was noteworthy. The stigmatization of antidepressants by patients was identified as a barrier to medication adherence. The involvement of family members and the motivation of patients to be actively involved in the process to recover from the disease were identified as facilitating factors. The work carried out suggests the need for patients to have rigorous information about the disease/treatment to reduce the possible prejudices generated by beliefs. Maintaining greater contact and monitoring of patients/caregivers to help therapeutic adherence in patients with depressive disorders was also identified as being of great importance.

Effectiveness of interventions to improve medication adherence in adults with depressive disorders: a meta-analysis

BACKGROUND

Non-adherence to medication is a major obstacle in the treatment of depressive disorders. We systematically reviewed the literature to evaluate the effectiveness of interventions aimed at improving adherence to medication among adults with depressive disorders with emphasis on initiation and implementation phase.

METHODS

We searched Medline, EMBASE, The Cochrane Central Register of Controlled Trials (CENTRAL), PsycINFO, Social Science Citation Index and Science Citation Index for randomized or non-randomized controlled trials up to January 2022. Risk of bias was assessed using the criteria of the Cochrane Collaboration. Meta-analyses, cumulative and meta-regression analyses for adherence were conducted.

RESULTS

Forty-six trials (n = 24,324) were included. Pooled estimate indicates an increase in the probability of adherence to antidepressants at 6 months with the different types of interventions (OR 1.33; 95% CI: 1.09 to 1.62). The improvement in adherence is obtained from 3 months (OR 1.62, 95% CI: 1.25 to 2.10) but it is attenuated at 12 months (OR 1.25, 95% CI: 1.02 to 1.53). Selected articles show methodological differences, mainly the diversity of both the severity of the depressive disorder and intervention procedures. In the samples of these studies, patients with depression and anxiety seem to benefit most from intervention (OR 2.77, 95% CI: 1.74 to 4.42) and collaborative care is the most effective intervention to improve adherence (OR 1.88, 95% CI: 1.40 to 2.54).

CONCLUSIONS

Our findings indicate that interventions aimed at improving adherence to medication among adults with depressive disorders are effective up to six months. However, the evidence on the effectiveness of long-term adherence is insufficient and supports the need for further research efforts.

TRIAL REGISTRATION

International Prospective Register for Systematic Reviews (PROSPERO) number: CRD42017065723 .

[Acute poisoning by chemical products: analysis of the first 15 years of the Spanish Toxic Surveillance System (SETv)]

OBJECTIVE

There are few epidemiological studies on acute poisonings from pesticides, industrials and household products in Spain. The objective of this work is to describe the epidemiological and clinical profile of acute poisonings by chemical products in our country, and analyze their annual evolution.

METHODS

The Spanish Toxicovigilance System (SETv) is a prospective registry that includes 32 Emergency Departments and Intensive Care Units in Spain. An observational descriptive study of acute poisoning by chemical agents (excluding pharmacological products and illicit drugs) was carried out, within 1999-2014. Statistical analysis was performed using Chi-square or exact Fisher's tests. Non-parametric continuous variables were compared using the Mann-Whitney U test. P-value less than 0.05 were considered significant.

RESULTS

The 10,548 cases studied had a mean age of 38.41 (±22.07) years, being significantly higher in women (p=0.0001). 67.7% of the poisonings occurred at home, and the most frequent routes of exposure were respiratory (48.3%), digestive (35.3%) and ocular (13.1%). The most frequent toxic groups were toxic gases (31%), caustics (25.6%) and irritant gases (12.1%). Of the patients that required treatment (76.2%), antidotes were used in 27.2%. 20.6% of the patients were admitted at Hospital, with a median stay of 32 (±151.94) days, with significant differences for pesticides and solvents (p=0.02). Sequelae were presented at discharge in 2.1% of patients. Mortality was 1.4% (146 patients) with a mean age of 62.08 years (±19.58) (p=0.0001).

CONCLUSIONS

The reduction of chemical poisonings should be prevented in the domestic environment, taking into account the sources of exposure to carbon monoxide and the handling of household cleaning products, both caustic liquids and the generation of irritating gases when mixed.