The Longitudinal Study of Dentists’ Practice Activity has collected data at 5-year intervals since 1983, with response rates of 73.4% in 1983–84, 75.5% in 1988–89, 73.9% in 1993–94 and 71.2% in 1998–99.

The study is based on random samples of 10% of male dentists and 40% of female dentists from the dental registers of each State/Territory in Australia, with sample supplementation at each point in time to ensure representative cross-sectional estimates.