Results 281 to 290 of about 2,471,157 (341)

An observational study of the reliability and concurrent validity of heart rate variability devices in athletes. [PDF]

Front Physiol
Johansson H, Adderley E, Clarke S, McIntyre P, Reilly G, Caulfield B, Holden S.   +6 more
europepmc   +1 more source

Clinical Outcomes of Patients with Colorectal Cancer Who Underwent Comprehensive Genomic Profiling: A Single-institution Non-comparative Prospective Observational Study

Yoshiko Mori, Okihide Suzuki, Noriko Tanabe, Aoi Sugino, Takehiro Shiraishi, Norimichi Chiyonobu, Kenichi Chikatani, Noriyasu Chika, Satoshi Hatano, Takatoshi Matsuyama, Keiichiro Ishibashi, Hideyuki Ishida   +11 more
openalex   +2 more sources

Treatment limitation decision in delirium: a secondary analysis of a prospective observational study. [PDF]

BMC Med Ethics
Montaut V, Bergqvist L, Zender H, Donzé J, John G.   +4 more
europepmc   +1 more source

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Observational Studies

Respiratory Care, 2023
Studies can be observational or experimental. With an observational study, the investigator does not determine the assignment of subjects, and there might not be a control group. If there is a control group, assignment of the independent variable (exposure or intervention) is not under the control of the investigator.
  +5 more sources