Finally, we examined relationships of increased or decreased expression to greater symptom severity, after controlling for several potential confounding factors, including medications.
In the analysis the association was controlled for several potential confounding factors, however some potential psychosocial confounders, for instance stress, anxiety or depression disorders, were not measured, and consequently could not be controlled for.
Third, several potential confounding factors, such as physical activity levels, socioeconomic status, life style, severity of schizophrenia, and antipsychotic medications, were not assessed in our study.
Furthermore, despite adjusting for several potential confounding factors, including physical activity and diet quality, it is possible that other confounders may be relevant.
While the link between work hours and increased risk of injury seems clear, several potential confounding factors must be considered for injuries sustained on the job.
This made it possible to adjust for several potential confounding variables including anxiety and depression [30].
However, it is difficult to reach a firm conclusion regarding the opposite trends given that there were several potential confounding factors.
This was a prospective study designed to determine the extent to which the degree of exposure to prenatal maternal stress due to a natural disaster explains variance in the intellectual and language performance of offspring at age 5½ while controlling for several potential confounding variables.
Moreover, we were able to control for the effects of several potential confounding factors.
In addition, both data were comprehensive enough to evaluate the effects of several potential confounding and modifying factors.
[18] Several potential confounding factors derived from the baseline interview and physical examinations were included in the regression models based on findings from previously published studies.
