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Table 1 Main characteristics and risk factors of the 4 dually infected CT-positive and NG-positive cases

From: Population prevalence of Chlamydia trachomatis and Neisseria gonorrhoeae in the Netherlands. should asymptomatic persons be tested during Population-based chlamydia Screening also for gonorrhoea or only if chlamydial infection is found?

  Case 1 Case 2 Case 3 Case 4
Sex female female female female
Age 17 yr 17 yr 17 yr 18 yr
Ethnicity Dutch Surinamese Dutch Surinamese
Level of urbanisation * high urban very high urban very high urban high urban
Level of education unknown intermediate low high
Symptoms:     
   Intermenstrual and/or postcoital bleeding + - + -
   Painfull/frequent mixturation + + + +
   Lower abdominal pain - + + +
Lifetime partners 2–5 6–10 6–10 6–10
Partners previous 6 months 1 1 2–5 2–5
New partner previous 2 months - - + +
Condom use last sexual contact - - - -
History of previous STI + - + -
  1. * According to Area Address Density: very high urban (> 2500 addresses/km2); high urban (1500–2500 addresses/km2); moderate urban (1000–1500 addresses/km2);) low urban (500–1000 addresses/km2); and rural (<500 addresses/km2) http://www.cbs.nl.