RT Journal Article
SR Electronic
T1 Letter to the Editor
JF Pediatrics
JO Pediatrics
FD American Academy of Pediatrics
SP 490
OP 491
VO 86
IS 3
A1 Halsey, Neal
A1 Holt, Elizabeth
YR 1990
UL http://pediatrics.aappublications.org/content/86/3/490.2.abstract
AB Dr Brunskill's primary point appears to be in the final sentence of his letter. As noted in our discussion, we are well aware of the potential for hidden confounding factors in retrospective observational studies... We attempted to minimize this possibility by obtaining information on an extensive list of factors that might have confounded the relationship between vaccination and mortality and by controlling for these factors through multivariate analysis.1 Despite our rigor, we could have failed to measure all possible confounding variables.