Volume 14, Number 6—June 2008
Validation of Syndromic Surveillance for Respiratory Pathogen Activity
|Data type||Period||% Coverage†||Respiratory syndrome definitions‡||Analyzed data||International code system||Registry|
|Absenteeism||2002–2003||80§||Reported sick employees; no further medical information||Sick leave reports of employees||–||Statistics Netherlands (CBS), www.cbs.nl|
|General practice consultations||2001–2004||1–2||Symptoms and diagnoses indicating respiratory infectious disease||Symptoms and diagnoses recorded in practice or telephone consultations and in home visits||ICPC||Netherlands Information Network of General Practice (LINH), www.nivel.nl/linh|
|Pharmacy dispensations||2001–2003||85||Prescribed medications indicative for respiratory infectious disease||Prescription medications dispensed in Dutch pharmacies, coded according to the WHO ATC classification||ATC||Foundation for Pharmaceutical Statistics, http://www.sfk.nl|
|Hospitalization||1999–2004||99||General respiratory symptoms/diagnoses; specific respiratory biologic agent diagnoses||Discharge and secondary diagnoses, date of hospitalization||ICD-9-CM||Dutch National Medical Register (LMR)|
|Laboratory submissions¶||2001–2004 (1999–2000 excluded due to unstable coverage)||16||All submissions for microbiologic diagnostic tests on respiratory materials; all submissions for serologic testing on known specific respiratory pathogens; all submissions for Legionella or Streptococcus pneumoniae antigen tests on urine||Laboratory submission requests for diagnostic testing||–||National Infectious Diseases Information System (ISIS) (13)|
|Mortality||1999–2004||100||General respiratory symptoms/diagnoses; specific respiratory biologic agent diagnoses||Date of death, primary cause of death, complicating factors, other additional causes of death||ICD-10||CBS|
*ICPC, International Classification of Primary Care; WHO, World Health Organization; ATC, Anatomic Therapeutic Chemical Classification System; ICD-9-CM, International Classification of Diseases, 9th revision, Clinical Modification; ICD-10, International Classification of Diseases, 10th revision.
†Percentage of total population, 16.3 million.
‡For detailed syndrome definitions and codes, see Technical Appendix.
§Percentage of working population, 8 million.
¶Diagnostic test requests with both negative and positive results.