Results 241 to 250 of about 48,746 (275)

Pitfalls of Using Negative Control Outcomes in Environmental Epidemiology. [PDF]

open access: yesCurr Environ Health Rep
McBrien H   +5 more
europepmc   +1 more source

The Effects of Jet Fuel Exposure on the Innate and Adaptive Immune Systems: A Fit-for-Purpose Systematic Literature Review. [PDF]

open access: yesJ Occup Environ Med
Bowers EC   +14 more
europepmc   +1 more source

Oral contraceptive use and venous thromboembolism: a consideration of the impact of bias and confounding factors on epidemiological studies

The European Journal of Contraception & Reproductive Health Care, 1996
Recent epidemiological studies have reported an approximately two-fold, significant, increased odds ratio for venous thromboembolism in users of third-generation oral contraceptives (OCs) compared to users of second-generation OCs. However, in each study, this association is of borderline statistical significance, and the studies do not indicate an ...
H, Rekers, T, Norpoth, M A, Michaels
openaire   +2 more sources

Two critical confounding factors in periodontal epidemiology.

Community dental health, 1992
The prevalence and severity of periodontitis is considerably lower than was previously estimated. The available epidemiological methods are based on the premise that loss of periodontal attachment is a unique sign of periodontitis. However, additional factors resulting in loss of periodontal attachment confound data obtained from modern studies.
N G, Clarke, R S, Hirsch
openaire   +1 more source

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