A<unk>  is a clinical study that includes all eligible patients identified by the researchers during the study registration period. The patients are treated in the order in which they are identified. This type of study usually does not have a control group. For example, in Sugrue, et al. (2016), a<unk>  design was used to determine trends in hand surgery research.
Consecutive case series
Multiple baseline design
Natural history study
Retrospective cohort study
Randomized controlled trial
Nested case–control study
Prospective cohort study
Placebo-controlled study