Sentence examples for comparative observational study from inspiring English sources

In contrast to a manipulated experiment, which deliberately imposes treatments on experimental plots with the aim of observing a particular response, a comparative observational study involves collecting and analysing data from different site conditions without actively pre-defining these conditions (Kuehl 1994).

This was a prospective, randomized, comparative observational study.

Kaul, R. et al. Intravenous immunoglobulin therapy for streptococcal toxic shock syndrome a comparative observational study.

An historical comparative observational study.

A comparative observational study with two cohorts was performed.

Design Population wide comparative observational study of mortality.

Initial searches failed to identify any randomised or comparative observational studies comparing MoM with any of the chosen alternatives.

Tree species diversity experiments therefore need to be complemented with comparative observational studies in existing forests.

The knowledge gained from comparative observational studies has served as a base for experimental interventions in animal models to induce or ameliorate scar.

We conducted comparative observational studies and questionnaire surveys of two large Australian teaching hospitals similar in size, role and CD structure.

Comparative observational studies are also known as quasi-experiments (Campbell and Stanley 1963; Cook and Campbell 1979).