A Pilot Study of Barriers to Medication Adherence in Schizophrenia

ArticleinThe Journal of Clinical Psychiatry 65(2):211-6 · February 2004with60 Reads
Impact Factor: 5.50 · DOI: 10.4088/JCP.v65n0211 · Source: PubMed
  • 28.09 · University of Arkansas for Medical Sciences
  • 35.89 · Central Arkansas Veterans Healthcare System
  • 27.56 · University of Arkansas for Medical Sciences
  • 40.39 · University of California, Riverside
Abstract

Interventions to improve adherence to antipsychotic medication are needed. The aims of the current study were to identify the most common barriers to medication adherence in a cohort of patients receiving outpatient and inpatient treatment for an acute exacerbation of schizophrenia, compare clinical and demographic characteristics of patients with lower versus higher numbers of barriers, and characterize patients most likely to be nonadherent to antipsychotic medication. The present study analyzed data collected during the Schizophrenia Guidelines Project (SGP), a multisite study of strategies to implement practice guidelines that was funded by the U.S. Department of Veterans Affairs and conducted from March 1999 to October 2000. Nurse coordinators had conducted clinical assessments and performed an intervention designed to improve medication adherence by addressing barriers to adherence. Data on patient symptoms, functioning, and side effects had been obtained using the Positive and Negative Syndrome Scale (PANSS), the Schizophrenia Outcomes Module, the Medical Outcomes Study 36-item Short-Form Health Survey, and the Barnes Akathisia Scale (BAS). Administrative data were used to identify patients with an ICD-9 code for schizophrenia. A total of 153 patients who met this criterion and participated in the intervention arm of the SGP had complete data available for analysis in the current study. The most common patient-reported barriers were related to the stigma of taking medications, adverse drug reactions, forgetfulness, and lack of social support. Bivariate analysis showed that patients with high barriers were significantly more likely to be nonadherent (p < or =.02), to have problems with alcohol or drug use (p =.02), to have higher PANSS total scores (p =.03), and to have higher mean BAS scores (p =.02). Logistic regression showed that lower patient education level (odds ratio [OR] = 3.95, p =.02), substance abuse (OR = 3.24, p =.01), high PANSS total scores (OR = 1.02, p =.05), and high barriers (OR = 2.3, p =.05) were significantly associated with the probability of nonadherence. It may be possible to identify patients most likely to benefit from adherence intervention. The data presented here will help to inform future research of clinical interventions to improve medication adherence in schizophrenia and help to stimulate further work in this area.

    • "patient choice and non-adherence), with no studies categorising the underlying reasons (Davis et al., 2014; Krivoy et al., 2011; Mustafa et al., 2015; Pai and Vella, 2012; Taylor et al., 2009). Our results are consistent with studies that have shown a quarter to two thirds of non-adherence to other antipsychotics was attributable to ADRs (Fenton et al., 1997; Hudson et al., 2004). Sedation was the most frequently cited adverse effect, accounting for 20% of all discontinuations. "
    [Show abstract] [Hide abstract] ABSTRACT: Clozapine is uniquely effective in the management of treatment-resistant schizophrenia (TRS). However, a substantial proportion of patients discontinue treatment and this carries a poor prognosis.
    Full-text · Article · May 2016
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    • "Some of the participants in that study related that the likelihood of adherence would have been larger if they early on had been honestly informed that the need for medication might be life-long. Patients in an earlier pilot study considered that the stigma of taking antipsychotics was the main barrier to adherence (Hudson et al., 2004). Others found that patients with employment had a more negative drug attitude and ran an increased risk of non-adherence, possibly connected to the stigma of having to take antipsychotics to function, and the drawback of simultaneously suffering from debilitating side effects (Freudenreich et al., 2004; Hofer et al., 2002). "
    [Show abstract] [Hide abstract] ABSTRACT: The aim was to apply a structured questionnaire, the Inventory of Stigmatizing Experiences (ISE), to study experiences of stigma (associated stigma) among relatives of persons with schizophrenia who attended outpatient clinics, using an approach based on assertive community treatment in a Swedish major city. A second aim was to explore the relationship between associated stigma and overall burden among these relatives. Relatives (N=65) of persons taking oral antipsychotics who attended outpatient clinics completed a mailed questionnaire that included the ISE and the Burden Inventory for Relatives of Persons with Psychotic Disturbances. Associations were analyzed with ordinal logistic regression. More than half of the relatives (53%) stated that their ill relative had been stigmatized, but only 18% (N=11) reported that they themselves had been stigmatized (responses of sometimes, often, or always). One-fifth of the relatives (23%) acknowledged that they avoided situations that might elicit stigma. Neither experienced stigma nor anticipated stigma was associated with overall burden level in ordinal logistic regression models. The impact of stigma on both the relative's personal quality of life and the family's quality of life were both significantly associated with overall burden after adjustment for patient age and level of functioning. Stigma had an impact on quality of life at the personal and family levels, and this was associated with overall burden. Increased awareness among service providers may decrease the impact of stigma on relatives, but associations need to be examined in larger studies in diverse cultures and treatment settings.
    Full-text · Article · Jun 2015 · Psychiatric services (Washington, D.C.)
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    • "In the present work, patients who chewed khat were more likely to be non-adherent compared to those who didn't. Many studies [23,24,26] reported that substance abuse was found to be significantly associated with non-adherence. A qualitative study conducted among persons with schizophrenia in Butajira, Ethiopia also found that alcohol drinking and khat chewing were important factors adversely affecting adherence [11]. "
    [Show abstract] [Hide abstract] ABSTRACT: Background Non-adherence to antipsychotic medication has a negative impact on the course of illness resulting in increased risk of relapse, rehospitalization and suicide, and increased costs to healthcare systems. The objective of this study was to investigate factors associated with medication adherence among patients with schizophrenia at Ayder Referral Hospital and Mekelle Hospital in Mekelle, Tigray region, Northern Ethiopia. Methods The study was a cross-sectional survey in which sociodemographic characteristics, drug attitudes, insight and side effects were measured and explored in terms of their relationship with medication adherence. A structured questionnaire as a data collection tool was used. Data were analyzed with the help of SPSS Version 20.0. Results A total of 393 patients participated, 26.5% were non-adherent to their antipsychotic medication. The factors significantly associated with better adherence were positive treatment attitudes (AOR = 1.40, 95% CI: 1.26, 1.55), fewer side effects (AOR = 0.97, 95% CI: 0.94, 0.99), awareness of illness (AOR = 1.44, 95% CI: 1.12, 1.85) and the ability to relabel symptoms (AOR = 1.57, 95% CI: 1.19, 2.07). However, khat chewers (AOR = 0.24, 95% CI: 0.09, 0.68), being illiterate (AOR = 0.13, 95% CI: 0.03, 0.47) and older age group (AOR = 0.03, 95% CI: 0.01, 0.16) were associated with less medication adherence. Conclusions A high prevalence of medication non-adherence was found among patients with schizophrenia. Intervention strategies focused on educating the patients to better understand the illness, medications and their potential side effects might be useful in improving adherence to antipsychotic medication treatment.
    Full-text · Article · Mar 2015 · PLoS ONE
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