Health statistics also are compiled from case records used to track care provided to patients.
Health care professionals are required to report certain conditions [such as communicable diseases] to the public health authorities.
Local health authorities compile registers of people living with selected conditions—such as cancers. These are based on case reports filed by physicians.
The introduction of electronic health records may open health statistics to using many other kinds of case records as these are recorded in standard formats.
Records of births, deaths, marriages and divorces yield important health related data. These are compiled by the National Center for Health Statistics from records submitted by state agencies. [see //www.cdc.gov/nchs/nvss.htm ]