Trends in sexually transmitted infections in the Netherlands, combining surveillance data from general practices and sexually transmitted infection centers

Table 1 Case-definitions of STIs

	LINH (GP network)-ICPC codes*		SOAP ^† (STI centers)
	Men	Women	Men	Women
STI-positive episodes
HIV infection/AIDS	B90		HIV-test	HIV-test
Non-specific urethritis	U72	Not included	Symptoms and exclusion of other STI	Not included
Syphilis	Y70	X70	Syphilis test	Syphilis test
Gonorrhea	Y71	X71	Gonorrhea test	Gonorrhea test
Trichomoniasis	Not included	X73	Not included	Trichomonas test
Herpes genitalis	Y72	X90	Symptoms, confirmed by test	Symptoms, confirmed by test
Genital warts	Y76	X91	Symptoms	Symptoms
Chlamydia
- main codes‡	Y74, Y99	X84, X85, X74	Chlamydia test	Chlamydia test
- sub codes	Y99.3	X84.1, X85.1, X74.1
STI-related episodes
Fear of HV/AIDS	B25	B25	All consultations without one of the above STI-diagnoses
Fear of STI	Y25	X23

* ICPC = International Classification of Primary Care
† SOAP = National Surveillance of STI centers
‡ Chlamydia defined by main codes combined with prescriptions of antibiotics with following ATC-codes: J01FA10 J01AA02 J01CA04, J01CR02 J01FA01 J01MA01 or J01MA02

ISSN: 2731-4553