scholarly journals The 8-item Morisky medication adherence scale: validation of a Portuguese version in HIV patients

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
A Aguiar ◽  
C Piñeiro ◽  
R Serrão ◽  
R Duarte
Keyword(s):  
Medication Adherence ◽  
Psychometric Properties ◽  
Reliability Analysis ◽  
Cronbach’S Alpha ◽  
Portuguese Version ◽  
Cronbach's Alpha ◽  
Adherence To Medication ◽  
Morisky Medication Adherence Scale ◽  
Adherence Scale ◽  
The Mean

Abstract Background Antiretroviral therapy (ART) has the most effective treatment for people with HIV, but its effectiveness depends on the individual medication adherence. Morisky Medication Adherence Scale (MMAS-8) is one of the most widely used scales to assess patient adherence. Thus, we aimed to validate a Portuguese version of MMAS-8 and determine its psychometric properties in HIV positive patients. Methods A cross-sectional survey was conducted in Centro Hospitalar Universitário São João (Porto, northern Portugal) at the infectious diseases department. After authorization to use the scale - granted by the author - and, a standard forward-backwards procedure to translate MMAS-8 to Portuguese, the questionnaire was applied to 233 patients with HIV doing ART. Reliability was assessed using Cronbach's alpha and test-retest reliability. Three levels of adherence were considered: 0 to < 6 (low), 6 to < 8 (medium), 8 (high). Results In the studied sample, the mean age was 45.03 years (SD = 11.63), 80.3% men, 19.3% women and 1 transgender, and 53.8% had ≤9 years of education. The mean number of prescribed ART per patient was 1.76. The mean score for the medication adherence scale was 7.29 (SD = 6.74). For the reliability analysis, 12 patients were excluded due to missing data (n = 221). Regarding the level of adherence, 22.5% were low adhering, 71.6% medium and 5.9% high. Corrected item-total correlations showed that 1 item does not correlate very well with the overall scale and was dropped. Scale reliability analysis for the remaining 7 items revealed an overall Cronbach's alpha of 0.661. Women had a protective effect on adherence (OR = 0.31;95%CI:0.15-0.66). Number of years doing ART, age of participants, and type of residence didn't show to be correlated with adherence. Conclusions MMAS-8 is a reliable and valid measure to detect patients at risk of non-adherence. A satisfactory Cronbach's alfa (0.661) was obtained. In general, adherence to medication was medium or high. Key messages This scale can be applied nationwide in other different hospitals, as it could serve as a tool for measuring adherence to ART that can allow for better health care to the ones that are low adhering. A Portuguese version of the MMAS-8 was created for measuring adherence to ART that maintained a similar structure to the original MMAS-8 and good psychometric properties.

scholarly journals Revisiting the internal consistency and factorial validity of the 8-item Morisky Medication Adherence Scale

2016 ◽  
Vol 4 ◽  
pp. 205031211667485 ◽  
Author(s):  
Arsène Zongo ◽  
Line Guénette ◽  
Jocelyne Moisan ◽  
Laurence Guillaumie ◽  
Sophie Lauzier ◽  
...  
Keyword(s):  
Medication Adherence ◽  
Drug Treatment ◽  
Internal Consistency ◽  
Factorial Validity ◽  
Cronbach’S Alpha ◽  
Cross Sectional ◽  
Cronbach's Alpha ◽  
Morisky Medication Adherence Scale ◽  
Adherence Scale ◽  
Scale 8

Objective: To assess the internal consistency and factorial validity of the adapted French 8-item Morisky Medication Adherence Scale in assessing adherence to noninsulin antidiabetic drug treatment. Study Design and Setting: In a cross-sectional web survey of individuals with type 2 diabetes of the Canadian province of Quebec, self-reported adherence to the antidiabetes drug treatment was measured using the Morisky Medication Adherence Scale-8. We assessed the internal consistency of the Morisky Medication Adherence Scale-8 with Cronbach’s alpha, and factorial validity was assessed by identifying the underlying factors using exploratory factor analyses. Results: A total of 901 individuals completed the survey. Cronbach’s alpha was 0.60. Two factors were identified. One factor comprised five items: stopping medication when diabetes is under control, stopping when feeling worse, feeling hassled about sticking to the prescription, reasons other than forgetting and a cross-loading item (i.e. taking drugs the day before). The second factor comprised three other items that were all related to forgetfulness in addition to the cross-loading item. Conclusion: Cronbach’s alpha of the adapted French Morisky Medication Adherence Scale-8 was below the acceptable value of 0.70. This observed low internal consistency of the scale is probably related to the causal nature of the items of the scale but not necessarily a lack of reliability. The results suggest that the adapted French Morisky Medication Adherence Scale-8 is a two-factor scale assessing intentional (first factor) and unintentional (second factor) non-adherence to the noninsulin antidiabetes drug treatment. The scale could be used to separately identify these outcomes using scores obtained on each of the sub-scales.

Validation of the Sinhala version of the Morisky Medication Adherence Scale to determine medication adherence in patients with bipolar affective disorder on lithium therapy

2018 ◽  
Vol 6 (1) ◽  
pp. 30
Author(s):  
Uthpali Mannapperuma ◽  
Priyadarshani Galappatthy ◽  
Varuni A De Silva ◽  
Raveen Hanwella ◽  
Raveendra Laal Jayakody ◽  
...  
Keyword(s):  
Medication Adherence ◽  
Internal Consistency ◽  
Lithium Concentration ◽  
Bipolar Affective Disorder ◽  
Lithium Therapy ◽  
Cronbach’S Alpha ◽  
Serum Lithium Concentration ◽  
Cronbach's Alpha ◽  
Morisky Medication Adherence Scale ◽  
Adherence Scale

Rationale, aims and objectives: The Morisky Medication Adherence Scale (MMAS-8) is a self-reported scale used in assessing medication adherence in patients on chronic therapy. Medication adherence is a neglected area of research in Sri Lanka and in this study we have attempted to validate the Sinhala translation of the MMAS-8 to determine medication adherence among patients stabilized on lithium therapy for bipolar disorder (BD).Methods: The MMAS-8 was translated to Sinhala with standard forward and backward translations from English to Sinhala. Patients with BD on stable doses of lithium were administered the Sinhala version of the MMAS-8. During the same visit, the serum lithium concentration was measured. Criterion validity was assessed using therapeutic serum lithium concentrations as the gold standard. Internal consistency was assessed using Cronbach’s alpha and Spearman’s rank correlation was used to assess test-retest reliability.Results: From a sample of 240 patients, 82.1% were considered adherent, with serum lithium concentration >0.4 mmol/L. The mean MMAS-8 score was 6.95±1.3. According to the MMAS-8 scale, 13.3% reported low adherence while 43.3% reported medium and high adherence equally using MMAS cut offs <6, 6 to<8 and 8 respectively. The scale sensitivity to identify adherence at a cut-off score of 6 was 86.3%. The test–retest reliability value was 0.708 (p<0.001). Internal consistency was found with a Cronbach’s alpha value of 0.608 for the 8 items of the scale.Conclusion: The Sinhala version of MMAS-8 can be used as a sensitive instrument to identify medication adherence in patients with bipolar disorders.

Morisky Medication Adherence Scale--Brazilian–Portuguese Version

2014 ◽  
Author(s):  
Alfredo Dias de Oliveira-Filho ◽  
Donald E. Morisky ◽  
Sabrina Joany Felizardo Neves ◽  
Francisco A. Costa ◽  
Divaldo Pereira de Lyra
Keyword(s):  
Medication Adherence ◽  
Brazilian Portuguese ◽  
Portuguese Version ◽  
Morisky Medication Adherence Scale ◽  
Adherence Scale

scholarly journals Psychometric properties of the Polish version of the eight-item Morisky Medication Adherence Scale in hypertensive adults

2016 ◽  
Vol Volume 10 ◽  
pp. 1759-1766 ◽  
Author(s):  
Beata Jankowska-Polańska ◽  
Izabelle Uchmanowicz ◽  
Anna Chudiak ◽  
Krzysztof Dudek ◽  
Donald Morisky ◽  
...  
Keyword(s):  
Medication Adherence ◽  
Psychometric Properties ◽  
Polish Version ◽  
Morisky Medication Adherence Scale ◽  
Adherence Scale

The 8-item Morisky Medication Adherence Scale: Validation of a Brazilian–Portuguese version in hypertensive adults

2014 ◽  
Vol 10 (3) ◽  
pp. 554-561 ◽  
Author(s):  
Alfredo Dias de Oliveira-Filho ◽  
Donald E. Morisky ◽  
Sabrina Joany Felizardo Neves ◽  
Francisco A. Costa ◽  
Divaldo Pereira de Lyra
Keyword(s):  
Medication Adherence ◽  
Scale Validation ◽  
Brazilian Portuguese ◽  
Portuguese Version ◽  
Morisky Medication Adherence Scale ◽  
Adherence Scale

Psychometric properties of the 8-item Morisky Medication Adherence Scale in patients taking warfarin

2012 ◽  
Vol 108 (10) ◽  
pp. 789-795 ◽  
Author(s):  
Ye Wang ◽  
Ming Kong ◽  
Yu Ko
Keyword(s):  
Medication Adherence ◽  
Psychometric Properties ◽  
Predictive Value ◽  
Future Research ◽  
Cross Sectional Survey ◽  
Convenience Sample ◽  
Adherence To Diet ◽  
Patient Reported ◽  
Morisky Medication Adherence Scale ◽  
Adherence Scale

SummaryThere is no patient-reported medication adherence measure that has been validated in Singapore. This study aimed to validate the 8-item Morisky Medication Adherence Scale (MMAS) in patients taking warfarin in Singapore. A cross-sectional survey was conducted in a convenience sample of 151 patients taking warfarin at an anticoagulation clinic in 2011. Respondents completed the MMAS in English or Chinese depending on their preference. The MMAS had a Cronbach′s alpha of 0.56 and good criterion-related validity as the scale scores were associated with warfarin refill rates (p = 0.04). Respondents with higher MMAS scores were found to have a higher percentage of International Normalised Ratios (INRs) within the therapeutic range (p = 0.01), higher adherence to diet recommendations (p = 0.02), and less perceived difficulty in taking all medications (p < 0.001); they were also more likely to take warfarin at the same time every day (p < 0.001). Confirmatory factor analysis showed that the eight items loaded onto one factor (RMSEA = 0.03). The sensitivity, specificity, positive predictive value and negative predictive value of the MMAS for identifying patients with poor INR control were 73.0%, 35.6%, 49.5% and 60.5%, respectively, using the time in the therapeutic INR range as the gold standard. This study shows that the 8-item MMAS has good validity and moderate reliability in patients taking warfarin. Future research is needed to investigate the scale′s psychometric properties in other patient populations and clinical settings.

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