Accueil
Détail de l'auteur
Auteur N. J. WELTON |
Documents disponibles écrits par cet auteur (3)
Ajouter le résultat dans votre panier Faire une suggestion Affiner la recherche
Article : Périodique
H. E. JONES ; R. J. HARRIS ; B. C. DOWNING ; M. PIERCE ; T. MILLAR ; A. E. ADES ; N. J. WELTON ; A. M. PRESANIS ; D. DE ANGELIS ; M. HICKMAN |BACKGROUND AND AIMS: Indirect estimation methods are required for estimating the size of populations where only a proportion of individuals are observed directly, such as problem drug users (PDUs). Capture-recapture and multiplier methods are wi[...]Article : Périodique
Concentrations of metabolites of illicit drugs in sewage water can be measured with great accuracy and precision, thanks to the development of sensitive and robust analytical methods. Based on assumptions about factors including the excretion pr[...]Article : Périodique
H. E. JONES ; N. J. WELTON ; A. E. ADES ; M. PIERCE ; W. DAVIES ; B. COLEMAN ; T. MILLAR ; M. HICKMAN |Background and Aims: Capture-recapture (CRC) analysis is recommended for estimating the prevalence of problem drug use or people who inject drugs (PWID). We aim to demonstrate how naive application of CRC can lead to highly misleading results, a[...]