Assessment of the Prescriber's and the Pharmacies Overview of Patient Medication by Use of the Fidelity Coefficient.

NCT ID: NCT01128660

Last Updated: 2013-02-04

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

283388 participants

Study Classification

OBSERVATIONAL

Study Start Date

2010-06-30

Study Completion Date

2010-08-31

Brief Summary

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The purpose of this study is to twofold. The investigators wish to introduce a new patient-descriptive parameter, the 'Fidelity Coefficient', and use it to assess and compare the overview of patient's medication possessed by the general practitioners and the pharmacies.

Detailed Description

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The fidelity coefficient, FC, is a measure of what proportion of individual patients' medication that are accounted for by the most used prescriber and the most used pharmacy. Each patient therefore has two values, one describing his fidelity towards his most used prescriber, FCPresc, and one describing his fidelity towards his most used pharmacy, FCPharm.

The investigators intend to assess this parameter in an observational population scale database study, using standard descriptive statistics, and subsequently compare the obtained average FCPresc and FCPharm.

Furthermore, the investigators will analyze the two obtained FCs for dependency of a predefined list of variables: age, gender, number of prescriptions, whether the most frequent prescriber was a GP and whether the most used pharmacy was urban.

Finally, the investigators intend to analyze which medications (grouped using the ATC-system with 4 digits, e.g. C07A) that has the highest proportion of prescriptions that were either issued by a non-main prescriber or redeemed at a non-main pharmacy, which roughly translates into the most 'infidel' medications. To insure relevance we intend to use a cut-off-value of the medication being prescribed at least 50.000 times, which equals about 85 % of the data according to preceding analyses.

The data for this study will be obtained from the Odense University Pharmacoepidemiological Database (OPED). In brief, it is a research database with full coverage of all reimbursed prescriptions in the Region of Southern Denmark (1.2 million inhabitants). The data included in each prescription record includes the prescription holder, the prescriber, the pharmacy, the date of dispensing and a full account of the dispensed product, including substance, brand name, route of administration, ATC-code and Defined Daily Dose (DDD).

Some drugs are exempt from re-imbursement and thus not covered by the database, including benzodiazepines, oral contraceptives, laxatives and certain antibiotics.

Conditions

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Misuse of Prescription Only Drugs

Study Design

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Observational Model Type

COHORT

Study Time Perspective

RETROSPECTIVE

Study Groups

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RSD-citizens

Residents of Southern Denmark, who filed more than 9 prescriptions during 2009.

No interventions assigned to this group

Eligibility Criteria

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Inclusion Criteria

* Having filed more than 9 prescriptions during 2009.

Exclusion Criteria

* None
Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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University of Southern Denmark

OTHER

Sponsor Role lead

Responsible Party

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Jesper Hallas

Professor of Clinical Pharmacology

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Jesper Hallas, MD, PhD

Role: PRINCIPAL_INVESTIGATOR

Professor, Research Unit of Clinical Pharmacology, University of Southern Denmark.

Anton Pottegard, BSc in Pharm

Role: PRINCIPAL_INVESTIGATOR

Guest Researcher, Research Unit of Clinical Pharmacology, University of Southern Denmark.

Locations

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Research Unit of Clinical Pharmacology, University of Southern Denmark

Odense, Funen, Denmark

Site Status

Countries

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Denmark

References

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Pottegard A, Hallas J. Physicians' and pharmacies' overview of patients' medication. An analysis of fidelity coefficients. Eur J Clin Pharmacol. 2011 Sep;67(9):919-24. doi: 10.1007/s00228-011-1026-3. Epub 2011 Mar 12.

Reference Type BACKGROUND
PMID: 21399945 (View on PubMed)

Other Identifiers

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JH-AP-001

Identifier Type: -

Identifier Source: org_study_id

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