Study type

Study topic

Human medicinal product

Study type

Non-interventional study

Scope of the study

Assessment of risk minimisation measure implementation or effectiveness

Data collection methods

Secondary use of data
Non-interventional study

Non-interventional study design

Cohort
Study drug and medical condition

Study drug International non-proprietary name (INN) or common name

PREGABALIN
GABAPENTIN
DULOXETINE
Population studied

Short description of the study population

French adult population of both gender, naive of any study medication or medication used in the same indication with abuse potential.
Patients must have the following criteria:
1. Aged 18 or more
2. New users of pregabalin, gabapentin of duloxetine between the first date of inclusion (15th of June 2006) and until 31th December 2012 (to grant a two-years minimum follow-up),
3. Subjects being reimbursed at least two delivery of medication group, at different dates (two delivery or more the same day, only once, will be considered as single time user)

Age groups

Adults (18 to < 46 years)
Adults (46 to < 65 years)
Adults (65 to < 75 years)
Adults (75 to < 85 years)
Adults (85 years and over)

Estimated number of subjects

15000
Study design details

Main study objective

The main objective of this study will be to assess pregabalin abuse and its frequency in the French general population, in comparison to other drugs with similar indications (gabapentin and duloxetine), in a pharmacoepidemiological, observational, French national retrospective cohort study.The secondary objective is to determine the factors associated with abuse of each drug.

Outcomes

Occurrence of drug abuse along time will be the main outcome (abuse of pregabalin in pregabalin group, etc.). The abuse will be defined by the exceeding of maximum daily dose recommended. For every 3 drugs studies, this maximum corresponds to 2 daily DDD

Data analysis plan

Outcome will be abuse of the cohort study drug, defined as a daily abuse above the maximum recommended dose. Abuse will be investigated through a Kaplan-Meier survival model. Factors associated with abuse will be investigated through a Cox proportional hazard regression model with time dependent covariates.
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