Exact(2)
Thirdly, potential diagnosis biases and misclassification might exist due to the diagnoses of PHDs were ascertained retrospectively without further confirmations by headache experts.
In addition, all patient data are from the insurance claim data provided by NHIRD so potential misclassification might exist.
Similar(6)
Second, we relied on ICD-9-CM codes to identify cases and misclassifications might exist.
Misclassification bias might exist due to non-standardised coding in administrative ambulance data.
Exposure misclassification error might exist; however, our risk estimates were insensitive to alternative interpolation methods (data not shown).
Misclassification of diseases might exist in such claim data on the basis of the International Classifications of Disease Ninth Edition (ICD-9), Clinical Modification codes.
We propose four situations in which misclassification might be plausible.
But Joseph Anton was someone who might exist.
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