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Table 1 Expected number of participants per STI clinic at each follow-up moment

From: Study protocol of the iMPaCT project: a longitudinal cohort study assessing psychological determinants, sexual behaviour and chlamydia (re)infections in heterosexual STI clinic visitors

STI clinic Expected number of participants
Baseline (men/women) Baseline Ct+ Three-week Six-month Six-month Ct+ One-year
Twente 400 (160/240) 60 320 193 31 120
Hollands Noorden 400 (160/240) 60 320 193 31 120
Kennemerland 400 (160/240) 60 320 193 31 120
Amsterdam 800 (320/480) 120 640 385 62 240
Total 2000 (800/1200) 300 1600 964 155 600
  1. Abbreviations: Ct+ chlamydia positive