The Australian 2004–2006 National Survey of Adult Oral Health (NSAOH) examined 5,505 people selected from all 8 states and territories (Slade et al.,2007). People aged ≥ 15 years (hereafter “adults”) were selected at random from the population by a stratified, clustered, random sampling procedure. Telephone interviews of potential participants established eligibility and collected sociodemographic and dental care information. Those with natural teeth were invited to an oral epidemiological examination, after completion of which they received a questionnaire by mail. The target sample size was calculated to address different survey aims, namely, 80% power with
5% type-I error in detecting reductions of 10% in age-group specific mean DMFT since the 1987-1988 national survey. The survey was approved by the University of Adelaide’s Human Research Ethics Committee, and participants gave written informed consent. This manuscript is structured to address
STROBE guidelines (von Elm et al., 2007).