Summary of data reported to CDC's national automated biosurveillance system, 2008

Table 1 Primary data source, visit, and patient characteristics, BioSense, January-December 2008.

Data Source and Type	No. of facilities	Total visits, millions	Visits per facility per day, median*	Record receipt, median†‡	Age, median years‡	Gender, % female‡
DoD Outpatient Final Diagnosis	333	32.9	148, 34	2.2 days	29	43.5
VA Outpatient Final Diagnosis	770	54.4	48, 33	2.0 days	61	7.2
Civilian Hospitals Outpatient
Chief Complaint	85	4.6	121, 12	0.3 hour	52	64.8
Working Diagnosis	62	1.8	44, 4	4.6 days	53	64.2
Final Diagnosis	72	2.7	64, 7	5.1 days	51	62.7
Civilian Hospitals ED
Chief Complaint	532	18.1	76, 9	4 hours	35	55.8
Working Diagnosis	105	2.4	51, 55	1.8 days	35	56.1
Final Diagnosis	203	6.3	66, 70	5.1 days	35	56.4
Civilian Hospital Inpatient
Chief Complaint	115	1.7	32, 18	4 hours	50	59.3
Working Diagnosis	78	0.8	22, 13	8.1 days	51	58.1
Final Diagnosis	81	1.1	27, 16	9.9 days	47	59.2

DoD denotes Department of Defense, VA denotes Veterans Administration, ED denotes emergency department.
* Values are for weekdays, weekends.
† Time from patient visit to receipt of data at CDC.
‡ For these columns, data is from December 2008.

ISSN: 1472-6947