Quantitative Research Designs

ExperimentalObservational

Controlled trials

  • Randomised
  • Quasi-randomised and non-randomised

Prospective cohort study

  • Concurrent
  • Non-concurrent

Other intervention studies

  • Before and after
  • External controls
  • Historical controls
Case-control

Other observational studies

  • Cross-sectional
  • Mixed


Definitions


Papers

Essentials of Clinical Research Design (Pediatr Invest 2019)