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Sarem S, Nekka F, Ahmed IS, Litalien C, Li J. Impact of sampling time deviations on the prediction of the area under the curve using regression limited sampling strategies. Biopharm Drug Dispos 2015; 36:417-28. [PMID: 25845479 DOI: 10.1002/bdd.1951] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 03/11/2015] [Accepted: 03/28/2015] [Indexed: 11/07/2022]
Abstract
The regression limited sampling strategy approach (R-LSS), which is based on a small number of blood samples drawn at selected time points, has been used as an alternative method for the estimation of the area under the concentration-time curve (AUC). However, deviations from planned sampling times may affect the performance of R-LSS, influencing related therapeutic decisions and outcomes. The aim of this study was to investigate the impact of different sampling time deviation (STD) scenarios on the estimation of AUC by the R-LSS using a simulation approach. Three types of scenarios were considered going from the simplest case of fixed deviations, to random deviations and then to a more realistic case where deviations of mixed nature can occur. In addition, the sensitivity of the R-LSS to STD in each involved sampling point was evaluated. A significant impact of STD on the performance of R-LSS was demonstrated. The tolerance of R-LSS to STD was found to depend not only on the number of sampling points but more importantly on the duration of the sampling process. Sensitivity analysis showed that sampling points at which rapid concentration changes occur were relatively more critical for AUC prediction by R-LSS. As a practical approach, nomograms were proposed, where the expected predictive performance of R-LSS was provided as a function of STD information. The investigation of STD impact on the predictive performance of R-LSS is a critical element and should be routinely performed to guide R-LSS selection and use.
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Affiliation(s)
- Sarem Sarem
- Faculty of Pharmacy, Université de Montréal, Montreal, Canada.,Clinical Pharmacology Unit, CHU Ste-Justine, Montreal, Canada
| | - Fahima Nekka
- Faculty of Pharmacy, Université de Montréal, Montreal, Canada.,Centre de Recherches Mathématiques, Université de Montréal, Montreal, Canada.,Center for Applied Mathematics in Biosciences and Medicine, McGill University, Montreal, Canada
| | - Iman Saad Ahmed
- College of Pharmacy, University of Sharjah, Sharjah, United Arab Emirates
| | - Catherine Litalien
- Clinical Pharmacology Unit, CHU Ste-Justine, Montreal, Canada.,Department of Pediatrics, CHU Ste-Justine, Montreal, Canada.,Department of Pharmacology, Université de Montréal, Montreal, Canada
| | - Jun Li
- Faculty of Pharmacy, Université de Montréal, Montreal, Canada.,Centre de Recherches Mathématiques, Université de Montréal, Montreal, Canada.,Center for Applied Mathematics in Biosciences and Medicine, McGill University, Montreal, Canada
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Compliance spectrum as a drug fingerprint of drug intake and drug disposition. J Pharmacokinet Pharmacodyn 2012; 40:41-52. [PMID: 23250805 DOI: 10.1007/s10928-012-9285-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Accepted: 12/03/2012] [Indexed: 10/27/2022]
Abstract
Since drug related variability arises from different origins, particularly driven by the behaviour or physiology of the patient, the problems of drug intake and drug disposition are separately presented in general. To overcome the potential drawbacks of this artificial split, we propose in this paper a combined illustrative approach, named compliance spectrum, such that these two subprocesses can be equitably studied and visualized. We construct the compliance spectrum based on the Bayesian decision method we previously developed for the inverse problem of patient compliance within the framework of Population-PK. This spectrum provides an intuitive and interactive way to evaluate the relationship between drug intake and drug disposition along with their consequences on PK profile. As well, it opens a new direction for model quality diagnostic.
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