The results herein presented have not been published or presented before.
Pilot evaluation of an automated method to decrease false-positive signals induced by co-prescriptions in spontaneous reporting databases†
Version of Record online: 14 MAY 2013
Copyright © 2013 John Wiley & Sons, Ltd.
Pharmacoepidemiology and Drug Safety
Volume 23, Issue 2, pages 186–194, February 2014
How to Cite
Avillach, P., Salvo, F., Thiessard, F., Miremont-Salamé, G., Fourrier-Reglat, A., Haramburu, F., Bégaud, B., Moore, N., Pariente, A. and on behalf of l'Association des Centres Régionaux de Pharmacovigilance (2014), Pilot evaluation of an automated method to decrease false-positive signals induced by co-prescriptions in spontaneous reporting databases. Pharmacoepidem. Drug Safe., 23: 186–194. doi: 10.1002/pds.3454
- Issue online: 23 JAN 2014
- Version of Record online: 14 MAY 2013
- Manuscript Accepted: 26 MAR 2013
- Manuscript Revised: 22 MAR 2013
- Manuscript Received: 26 JUL 2012
- spontaneous reporting;
- adverse reaction;
- signal detection;
To test an automated method to decrease the number of false-positive (FP) signals of disproportionate reportings (SDRs) generated by co-prescription.
Automated backward stepwise removal of reports concerning the drug associated with the highest ranked SDR for an event was tested for gastric and oesophageal haemorrhages (GOH), central nervous system haemorrhages and cerebrovascular accidents (CNSH), ischaemic coronary artery disorders and muscle pains (MP) using the reporting odds ratio in the French spontaneous reporting research database. After ranking SDRs detected in the complete dataset on the lower limit of the reporting odds ratio 95% confidence interval, reports concerning the drug with the highest ranked SDR were removed. In the dataset thus generated, SDRs were again identified, ranked and reports related to the drug involved in the newly highest ranked SDR removed. The process was repeated until no signal was detected. Initially detected SDRs eliminated using this technique were assessed regarding the summary of products characteristics and the literature to determine their FP nature.
Seventeen SDRs were successively eliminated for GOH, 37 for CNSH, 15 for ischaemic coronary artery disorders, and 36 for MP. Four were FP for GOH, 29 for CNSH, 7 for ACI and none were FP for MP. The positive predictive value of the backward stepwise removal procedure in identifying FP SDRs ranged from 0% (MP) to 78.4% (CNSH).
Although further adjustment is needed to improve the method presented herein, our results suggest that numerous FP signals because of co-prescription bias could be eliminated using an automated method. Copyright © 2013 John Wiley & Sons, Ltd.