Al-dahbali, Abdullah; Awang, Rahmat
January 2007
Malaysian Journal of Medical Sciences;Jan2007 Supplement, Vol. 14, p156
Academic Journal
Introduction: Apart from morbidity and mortality linked to preventable drug-related problems (PDRPs), they have economic and humanistic consequences. This study estimates the effect of the PDRPs on the healthcare utilization (HCU). Methodology: Two consecutive academic years data of about the users of University Sains Malaysia (USM) healthcare services were extracted from USM computerized databases. A user is a USM health scheme beneficiary who utilized the services at least once in the study period. Variables collected were age, gender, race, eligibility type, enrollment period, hypersensitivity and dispensed medications with their doses, frequencies and duration. The investigated PDRPs categories were overprescribing (based on DDD methodology), drug interactions and allergenic prescriptions. The numbers of PDRPs in each DRPs category were calculated for each user. Health status was estimated from the dispensed medications. Demographic variables and health status were used to calculate propensity score (PS) for the PDRPs. PS was used to match users who were exposed to PDRPs to their counterparts. Weighted least square method (WLS) was used to estimate the effect of PDRPs on utilization. The number of visits (as a utilization measure) was calculated as well. Results: After matching users who were exposed to PDRPs to their controls, PDRPs explained 7% of the number of visits (p < 0.001). Users who were exposed to PDRP visited more than their counterparts (Wilcoxon signed-rank test, p < 0.001). Conclusion: PDRPs caused more healthcare utilization.


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