title: Reply to Cordi et al.
abstract: In their paper on the influence of the moon on sleep, Cordi et al.[1] have analyzed a large number of subjects and found no significant effects, as opposed to our positive study findings with a smaller cohort [2]. More is not necessarily better. There are two main reasons why we think the comparison of these two data sets is not just comparing a small with a big sample size, since increasing the number of study volunteers in a sleep study does not automatically increase data quality.
authors.affiliation: Centre for Chronobiology, Psychiatric Hospital of the University of Basel, 4012 Basel, Switzerland. Electronic address: christian.cajochen@upkbs.ch.
authors.forename: Christian
authors.initials: C
authors.lastname: Cajochen
authors.affiliation: Centre for Chronobiology, Psychiatric Hospital of the University of Basel, 4012 Basel, Switzerland.
authors.forename: Songül
authors.initials: S
authors.lastname: Altanay-Ekici
authors.affiliation: Solar Energy and Building Physics Laboratory, Swiss Federal Institute of Technology Lausanne, 1015 Lausanne, Switzerland.
authors.forename: Mirjam
authors.initials: M
authors.lastname: Münch
authors.affiliation: Centre for Chronobiology, Psychiatric Hospital of the University of Basel, 4012 Basel, Switzerland.
authors.forename: Sylvia
authors.initials: S
authors.lastname: Frey
authors.affiliation: Centre for Sleep Medicine, Hirslanden Clinic, 8702 Zollikon, Switzerland.
authors.forename: Vera
authors.initials: V
authors.lastname: Knoblauch
authors.affiliation: Centre for Chronobiology, Psychiatric Hospital of the University of Basel, 4012 Basel, Switzerland.
authors.forename: Anna
authors.initials: A
authors.lastname: Wirz-Justice
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D012890:Sleep / Q000502:physiology*