| 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) |