To the Editor: Dr Dales and colleagues1 reported that there was "essentially no correlation'' between rates of autism and measles-mumps-rubella (MMR) vaccine, but this conclusion is based on their Figure, which seems to be an optical illusion. We took the y-axis values directly from the Figure and computed the correlation coefficients, which are 0.73 and 0.90 between the total number of autism cases and the percentage of children receiving immunization by 24 months and 17 months, respectively. The illusion of no relationship is due to the vertically compressed graph. The apparent steepness of the autism curve may be attributed to the well-known epidemic effect of increased detection due to increasing vigilance.
Some tools below are only available to our subscribers or users with an online account.
Download citation file:
Web of Science® Times Cited: 3
Customize your page view by dragging & repositioning the boxes below.
More Listings atJAMACareerCenter.com >
Enter your username and email address. We'll send you a link to reset your password.
Enter your username and email address. We'll send instructions on how to reset your password to the email address we have on record.
Athens and Shibboleth are access management services that provide single sign-on to protected resources. They replace the multiple user names and passwords necessary to access subscription-based content with a single user name and password that can be entered once per session. It operates independently of a user's location or IP address. If your institution uses Athens or Shibboleth authentication, please contact your site administrator to receive your user name and password.