Journal of Epidemiology
Risk Factors Associated With Secondary Measles Transmission in Index Cases
By Yuki Takahashi, Hideo Tanaka, Toshiyuki Shibata and 17 others.
Abstract
Background
Limited information has been shown quantitatively assessed factors associated with the risk of secondary transmission in measles index cases.
Methods
We collected data on measles index cases reported in Osaka Prefecture between November 2018 and March 2019, along with their close contacts. Secondary attack rates (SARs) in contacts of index cases were calculated and compared depending on the vaccination status, classical or modified measles and other risk factors in index cases. For the multivariate analyses, we used binary logistic regression to adjust for these potential confounding factors on the secondary transmission and calculated the adjusted odds ratio (aOR) for the SARs.
