title: Some aspects of data analysis in dentistry.
abstract: In dentistry many studies collect hierarchical data, but this is not always recognised or understood by the researchers. This paper sets out to describe such studies and discusses aspects of their design, data collection and analysis. Sometimes these studies may be dealt with in a simple way, but others may require the help of a professional statistician to deal with analytical problems that are encountered.
authors.affiliation: Turner Dental School, Manchester, UK.
authors.forename: T V
authors.initials: TV
authors.lastname: Macfarlane
authors.forename: H V
authors.initials: HV
authors.lastname: Worthington
mesh_terms: D003627:Data Interpretation, Statistical; D003813:Dentistry; D006801:Humans; D015203:Reproducibility of Results; D012107:Research Design