Century month code for the first month of the calendar and for the cutoff for the health sections of the questionnaire. This is constant for all cases and is the century month code of January of the first year of the calendar/earliest year for inclusion in the health section.
This site uses cookies to optimize functionality and give you the best possible experience. If you continue to navigate this website beyond this page, cookies will be placed on your browser. To learn more about cookies, click here.