A reader noticed that the number of vaccinated individuals was misreferenced in the section with odds ratio of vaccine-preventable diagnosis and NNT calculations in Lyons-Weiler and Thomas (2020; Relative Incidence of Office Visits and Cumulative Rates of Billed Diagnoses Along the Axis of Vaccination). This minor error does not change the interpretation of the results. The corrected text is below.
“There was a total of 41 vaccine-targeted diagnoses in patients born into the practice, mostly (by far) in varicella (29) and less so in pertussis (10). Overall, the groups show differences in vaccine-targeted diagnoses (Table 7; χ2 = 0.292, p = 0.588). The rates of any diagnosis were vaccinated, 7/2756 (0.00254) and unvaccinated, 34/561 (0.064). The odds ratio of having a diagnosis of any vaccine-targeted infection (DxV/DxUV) was 0.0393 (0.0174 to 0.0893), Z-score, 7.743, p < 0.0001. Relative risk of any vaccine-targeted diagnosis was 0.0418 (0.0186 to 0.0938), Z = 7.697, p < 0.0001, number needed to treat (NNT) = 17.22 (14.729 to 20.725 (benefit)).“
Also, “The overall probability (risk) of a vaccine-targeted diagnosis in the unvaccinated, however,
was only 0.06 (34/561), among 13 conditions.”
We thank Jeremy Hammond for alerting us to this minor discrepancy and apologize for any confusion.