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Commonly reported perceived barriers to adherence by patients.
| Questionnaire item | Mean score |
| I just don't like taking medicine in general. | 5.69 |
| I just forget to take them. | 5.36 |
| I can't afford them. | 5.19 |
| I ran out of medication before I could call or visit my doctor or nurse. | 5.17 |
| My medicines make me feel bad or have side effects I don't like. | 5.15 |
