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- Title
Observation plans in longitudinal studies with time-varying treatments.
- Authors
Hernán, Miguel A.; McAdams, Mara; McGrath, Nuala; Lanoy, Emilie; Costagliola, Dominique
- Abstract
The article discusses the biases that may arise in interval cohorts with static observation plans. It explores the system of longitudinal studies, in which individuals are followed over time and their time-varying information on treatment is collected at certain intervals. It explains that biases rise as the observation regime or plan varies across individuals in many observational studies. It stresses another fact which states that intervals are dependent on an individual's clinical history.
- Subjects
LONGITUDINAL method; MEDICAL statistics; MEDICAL research; COHORT analysis; CASE method (Teaching)
- Publication
Statistical Methods in Medical Research, 2009, Vol 18, Issue 1, p27
- ISSN
0962-2802
- Publication type
Article
- DOI
10.1177/0962280208092345