The impact of misclassification bias stemming from analyses of claims data has been described in previous research [ 31, 32].
There may therefore be misclassification of exposures stemming from changes to participants' hardship levels in the interval between surveys.
Two studies on the same cohort already cited [ 19, 20] revealed a drawback in the cohort database stemming from a misclassification of both exposure and disease (information bias).
Exposure misclassification may also stem from our measures of prenatal PCE exposure, particularly cumulative exposure which combined both dose and duration.
However, residual confounding could stem from potential misclassification of drug use due to lack of compliance.
This is unlikely to stem from variations in exposure misclassification and might instead be attributed to differences in the selection effects associated with buffers of different sizes.
10 16 Other factors were not consistently associated with baseline infection across the sites, which may stem from unmeasured sexual network factors and misclassification error resulting from self-report.
This could stem from our assumption of complete case reporting and no misclassification of AIDS deaths: if, in fact, some diagnoses go unreported and some true AIDS deaths are misclassified, then our estimates will be too low.
These inconsistent results could stem from a number of factors including small sample size, different study design, or potential misclassification of exposures or confounding.
