For describing the reliability of a test, 2 factors are commonly used: sensitivity and specificity. What do these mean?

Sensitivity

This is the percentage of actually infected people that are identified correctly by the test. For example, if 100 test persons have Gonorrhoea and the test has a sensitivity of 99%, the test picks up on 99 of the infected people. 1 of them remains undiscovered, a so-called "false negative". If your test results are negative, but you experience symptoms, we recommend to retest or consult a doctor.

Specificity

This is the percentage of healthy people that are correctly labeled as healthy by the test. For example, if 100 healthy persons take a test and the specificity of the test is 98%, 98 people get a "negative" test result. 2 people are labeled "positive" incorrectly, so-called "false positives". If you tested positive, consult a doctor. The doctor will decide to start treatment directly or to first retest.

The sensitivity and specificity of our tests is found below. These numbers have been provided by the legal manufacturer of the tests.

Female Basics, Oral and Anal

  • Sensitivity Chlamydia: 95.2%
  • Sensitivity Gonorrhoea: 99.1%
  • Specificity Chlamydia: 97.6%
  • Specificity Gonorrhoea: 98.4%

At a 95% confidence interval.

Male Basics

  • Sensitivity Chlamydia: 96.5%
  • Sensitivity Gonorrhoea: 96.5%
  • Specificity Chlamydia: 98.7%
  • Specificity Gonorrhoea: 99.4%

At a 95% confidence interval.