C Kenyon1, J Buyze2, R Colebunders2. 1. Clinical HIV/STD Unit, Institute of Tropical Medicine, Nationalestraat 155, 2000 Antwerp, Belgium; Division of Infectious Diseases and HIV Medicine, Department of Medicine, Groote Schuur Hospital, Observatory, South Africa. Electronic address: chriskenyon0@gmail.com. 2. Clinical HIV/STD Unit, Institute of Tropical Medicine, Nationalestraat 155, 2000 Antwerp, Belgium.
Abstract
OBJECTIVES: This study sought to assess if there is a meaningful way in which variations in sexually transmitted infection (STI) prevalence can be classified at the level of world regions. METHODS: Linear regression was performed to assess if the incidence and prevalence of six STIs (HIV, herpes simplex virus type 2, chlamydia, gonorrhea, syphilis, and trichomoniasis) by world region was positively correlated. Partitioning around medoids (PAM) was then used to assess if the regions of the world can be classified according to the incidence and prevalence of these STIs. RESULTS: We found evidence that STI incidence/prevalence varies considerably in different regions around the world. Linear regression revealed that the incidence and prevalence of certain STIs by world region was positively correlated (Pearson's correlation coefficient varied from 0.664 to 0.985). PAM provided support for dividing the world regions into two, three, or four STI incidence/prevalence categories, but it provided most support for the two-category system. In each of these systems the East Asia/Pacific and North Africa/Middle East regions were in the lowest STI category and Sub-Saharan Africa was the only region in the high STI category. CONCLUSIONS: The incidence and prevalence of certain STIs by world region are positively correlated. The world regions can be meaningfully classified according to STI incidence/prevalence.
OBJECTIVES: This study sought to assess if there is a meaningful way in which variations in sexually transmitted infection (STI) prevalence can be classified at the level of world regions. METHODS: Linear regression was performed to assess if the incidence and prevalence of six STIs (HIV, herpes simplex virus type 2, chlamydia, gonorrhea, syphilis, and trichomoniasis) by world region was positively correlated. Partitioning around medoids (PAM) was then used to assess if the regions of the world can be classified according to the incidence and prevalence of these STIs. RESULTS: We found evidence that STI incidence/prevalence varies considerably in different regions around the world. Linear regression revealed that the incidence and prevalence of certain STIs by world region was positively correlated (Pearson's correlation coefficient varied from 0.664 to 0.985). PAM provided support for dividing the world regions into two, three, or four STI incidence/prevalence categories, but it provided most support for the two-category system. In each of these systems the East Asia/Pacific and North Africa/Middle East regions were in the lowest STI category and Sub-Saharan Africa was the only region in the high STI category. CONCLUSIONS: The incidence and prevalence of certain STIs by world region are positively correlated. The world regions can be meaningfully classified according to STI incidence/prevalence.
Authors: Lynette J Menezes; Ubin Pokharel; Staci L Sudenga; Matthys H Botha; Michele Zeier; Martha E Abrahamsen; Richard H Glashoff; Susan Engelbrecht; Maarten F Schim van der Loeff; Louvina E van der Laan; Siegfried Kipping; Douglas Taylor; Anna R Giuliano Journal: Sex Transm Infect Date: 2017-05-10 Impact factor: 3.519
Authors: Maria L Alcaide; Daniel J Feaster; Rui Duan; Stephanie Cohen; Chanelle Diaz; Jose G Castro; Matthew R Golden; Sarah Henn; Grant N Colfax; Lisa R Metsch Journal: Sex Transm Infect Date: 2015-06-12 Impact factor: 3.519
Authors: M O Chacon; T H S Fonseca; S B V Oliveira; M A Alacoque; L L Franco; C A Tagliati; G D Cassali; G P Campos-Mota; R J Alves; L S A Capettini; Maria Aparecida Gomes Journal: Parasitol Res Date: 2018-03-03 Impact factor: 2.289