UI Author Year Study Design * Inclusion Exclusion Enrollment Years Trial or Cohort Name Funding Source Extractor
17623801 Wu 2007 Case- cohort study
  • Male US health professionals (N=51,129)
  • subjects provided a blood sample in 1993 –1995 (N=18,225)
  • Cases: colorectal cancer diagnosed between 1993–01/2002
  • Controls: 1:2 matching by age (<2 y), year of enrollment, month of blood donation (<1 mo)
nd 1986 Health Professionals Follow-up Study (HPFS) cohort National Cancer Institute, National Institutes of Health (DiaSorin Corp (Maker of Vit D assay kit)) JHL/TTe

Leave appropriate choice of study design and delete all others


Post hoc analyses of an existing RCT for outcomes that were not planned in the original RCT

From: Appendix C, Evidence Tables: R-Z

Cover of Vitamin D and Calcium
Vitamin D and Calcium: A Systematic Review of Health Outcomes.
Evidence Reports/Technology Assessments, No. 183.
Chung M, Balk EM, Brendel M, et al.

NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.