"extensive cohort studies" is a correct and usable phrase in written English.
You could use it when discussing topics such as epidemiology or medical research. For example, "Longitudinal research utilizing extensive cohort studies will provide key insight into the relationship between this risk factor and outcomes."
Potential participants were recruited primarily from the Singapore Longitudinal Aging Study SLASS), an extensive cohort study of elderly participants in Singapore.
Findings from an extensive cohort study of 58,279 Western European men (ages 55 69 years) from 20 separate occupations are consistent with this reasoning (Zeegers et al. 2004).
To our knowledge, this is the most extensive longitudinal cohort study of adult kidney transplant recipients reported to date, as measured by the follow-up time of patients.
More extensive and extended hypothesis-driven epidemiological cohort studies are required to confirm this finding, and to determine whether bone demineralisation represents a new therapeutic target in reducing morbidity following critical illness.
When available, prospective cohort studies provide extensive data on potential risk factors and residential histories that address many methodological criticisms of cluster studies.
75 An extensive meta-analysis of occupational cohort studies of asbestos-exposed workers showed little relation to increased risk for renal cancer.
Yarborough undertook an extensive review of the epidemiological cohort studies in order to evaluate the extent of the evidence related to free chrysotile fibers, with particular attention to confounding by other fiber types, job exposure concentrations, and consistency of findings.
Adaptation of techniques previously used in business consumer behaviour modelling, allowed for the development of insights into health behaviour in a cost-effective manner without extensive and costly surveys or cohort studies.
Both extensive cohorts and expressive studies in these populations are missing.
