Bias introduced by conditioning on an intermediate variable: Comment on the article by Zhang et al
Arthritis Care Res (Hoboken)
.
2011 May;63(5):784.
doi: 10.1002/acr.20443.
Author
Yanyan Zhu
PMID:
21309007
DOI:
10.1002/acr.20443
No abstract available
Publication types
Letter
Comment
MeSH terms
Bias
Disease Progression
Humans
Osteoarthritis, Knee / diagnostic imaging
Osteoarthritis, Knee / etiology*
Radiography
Randomized Controlled Trials as Topic / methods*
Research Design*
Risk Assessment
Risk Factors