# discrepancies of numbers compared with Figure 1 due to missing age data for 40 clients.
n.a. =not applicable, because treponemal antibodies often persist after treatment. Among the clients reporting testing at least twice 28 (10.3%) had detectable treponemal antibodies. Since the result of the previous tests is unknown, new or re-infection rates could not be determined.
*= 295 had been tested at Hein&Fiete, 191 had been tested elsewhere first and the second time at Hein&Fiete.
°= clients had been tested at Hein&Fiete at least twice in 2011–2012, however it is unknown whether they had been tested twice for this STI or at this location.