Determination of factors affecting medication adherence in type 2 diabetes mellitus patients using a nationwide claim-based database in Japan


Autoři: Takeshi Horii aff001;  Kenji Momo aff002;  Takeo Yasu aff004;  Yusuke Kabeya aff005;  Koichiro Atsuda aff001
Působiště autorů: Research and Education Center for Clinical Pharmacy, Division of Clinical Pharmacy, Laboratory of Pharmacy Practice and Science 1, Kitasato University School of Pharmacy, Kanagawa, Japan aff001;  Department of Pharmacy, The Research Hospital, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan aff002;  Department of Hospital Pharmaceutics, School of pharmacy, Showa University, Tokyo, Japan aff003;  Department of Medicinal Therapy Research, Pharmaceutical Education and Research Center, Meiji Pharmaceutical University, Tokyo, Japan aff004;  Department of Home Care Medicine, Sowa Hospital, Kanagawa, Japan aff005
Vyšlo v časopise: PLoS ONE 14(10)
Kategorie: Research Article
doi: 10.1371/journal.pone.0223431

Souhrn

Background

The extent of medication adherence in patients with type 2 diabetes mellitus (T2DM) several years after starting treatment with hypoglycemic agents remains unknown. Most previous work on medication adherence targeting this group of patients has been undertaken across a single year or is questionnaire based. This study aimed to determine medication adherence status and factors affecting adherence 3 years after initiation of hypoglycemic agents, using a nationwide medical claim-based database in Japan.

Methods

This retrospective study was conducted on data from 884 subjects with T2DM to better understand medication adherence, the effects of polypharmacy, and other factors. We also investigated the effects of medication nonadherence on hemoglobin A1c levels. Proportion of days covered was defined as the number of days for which a hypoglycemic agent was prescribed and in the patient’s possession to the number of days in the observation period. A proportion of days covered ≥0.8 were considered adherent, and those with a value <0.8 as nonadherence. Polypharmacy was defined as taking ≥5 medications.

Results

Of the 884 patients investigated, 440 were considered adherent during the study period. Significant factors related to adherence included number of medications (3 or 4, or ≥5), male sex, age 50–<60 years, and total number of visits ≥17. Medication adherence was also a factor related to patients with hemoglobin A1c values < 7.0% at the end of the observation period.

Conclusions

We surveyed medication adherence for 3 years with post medication initiation, and found that subjects aged 50–<60 years, those with ≥3 concomitant medications, and those with a total number of visits ≥17 were more likely to be adherent and persistent, and more likely to continue their hypoglycemic agents. A high degree of medication adherence was found to have a positive influence on hemoglobin A1c levels.

Klíčová slova:

Age groups – Body mass index – Diabetes mellitus – Drug adherence – Drug therapy – HbA1c – Hypoglycemics – Type 2 diabetes


Zdroje

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PLOS One


2019 Číslo 10

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