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Table 1 Overview of general practice networks

From: Usefulness of primary care electronic networks to assess the incidence of chlamydia, diagnosed by general practitioners

  AMC network VUmc network IPCI LINH
Region South-east Amsterdam Amsterdam, Haarlem, Amstelveen Nationwide Nationwide
Year of data extraction 2007 2007 2005 2007
No of practices 5 21 81 81
Size of network population 35,137 66,402 235,307 327,725
Percentage of women 53% 53% 51% 51%
Patient characteristics Lower socioeconomic status and more often non-western descent than the general population; living in an highly urbanized area More often of Dutch descent; living in an highly urbanized area Representative sample of the general population [21] Representative sample of the general population [22]
Definition of chlamydia A chlamydia diagnosis was based on laboratory results, appropriate antibiotics or correct ICPC code in the medical record Idem, based on laboratory results, antibiotics and ICPC code Idem, based on laboratory results, antibiotics and ICPC code A chlamydia diagnosis was based on a specific ICPC sub-code or main-code combined with a chlamydia-related antibiotic
Overall incidence rate per 100,000 (95% CI) 590.2 (506.7 - 687.3) 275.4 (233.6 - 324.7) 103.2 (89.2 - 118.7) 195.9 (179.3 - 214.1)