Volume 8, Number 8—August 2002
Use of Automated Ambulatory-Care Encounter Records for Detection of Acute Illness Clusters, Including Potential Bioterrorism Events
|Syndrome||Rate/1,000 health plan members (no. of visits)a||Probabilityb||1999 average rates for this weekday in the same month||2000 average rates for this weekday in the same month|
|All combined||2.015 (328)||1.918||2.123|
|Upper respiratory||1.087 (177)||0.999||1.151||1.251|
|Lower respiratory||0.405 (66)||0.999||0.369||0.474|
|Upper gastrointestinal||0.166 (27)||0.999||0.094||0.110|
|Lower gastrointestinal||0.227 (37)||0.999||0.221||0.173|
|Influenza-like illness||0.117 (19)||—||—|
|CDC bioterrorism category A Agentsd||0.000 (0)||0||0|
aRepeated visits within 6 weeks excluded.
bProbability of at least this many episodes occurring at least once per year, when the data are adjusted for month, day of week, holidays, secular trend, and variability among census tracts
cCNS, central nervous system; CDC, Centers for Disease Control and Prevention.
dAnthrax, botulism, plague, smallpox, tularemia, and hemorrhagic fever.