Effect of dichotomising age in multivariate model analysis: Authors’ replySoler-Cataluña, J JMartínez-Garcia, M ARomán Sánchez, PAuthor informationHospital General de Requena, Unidad de Neumología, Servicio de Medicina Interna, Requena, Valencia 46430, Spain; [email protected]Thorax 61(6):p 548-549, June 2006.Copyright © 2006 BMJ Publishing Group Ltd & British Thoracic Society