TY - JOUR
T1 - Frequency and risk factors for incident and redetected Chlamydia trachomatis infection in sexually active, young, multi-ethnic women
T2 - A community based cohort study
AU - Aghaizu, Adamma
AU - Reid, Fiona
AU - Kerry, Sally
AU - Hay, Phillip E.
AU - Mallinson, Harry
AU - Jensen, Jorgen S.
AU - Kerry, Sarah
AU - Kerry, Sheila
AU - Oakeshott, Pippa
N1 - Publisher Copyright:
© 2014, BMJ Publishing Group. All rights reserved.
PY - 2014/11/1
Y1 - 2014/11/1
N2 - Objective: To investigate the frequency and risk factors for incident and redetected Chlamydia trachomatis infection in sexually active, young, multi-ethnic women in the community. Design: Cohort study. Setting: 20 London universities and Further Education colleges. Participants: 954 sexually experienced women, mean age 21.5 years (range 16-27), 26% from ethnic minorities, who were recruited to the Prevention of Pelvic Infection (POPI) chlamydia screening trial between 2004 and 2006, and returned repeat postal self-taken vaginal swabs 11-32 (median 16) months after recruitment. Results: The estimated annual incidence of chlamydia infection among 907 women who tested negative at baseline was 3.4 per 100 person-years (95% CI 2.5 to 4.6 per 100 person-years), but 6.6 per 100 person-years (95% CI 4.5 to 9.3 per 100 person-years) in the 326 teenagers (<20 years). Predictors of incident chlamydia infection were age <20 years (relative risk (RR) 4.0, 95% CI 2.1 to 7.5), and (after adjusting for age) a new sexual partner during 12 months follow-up (RR 4.4, 95% CI 2.0 to 9.9), smoking (RR 2.2 95% CI 1.2 to 3.9), concurrent bacterial vaginosis (RR 2.0 95% CI 1.1 to 3.9) and high risk carcinogenic human papillomavirus (RR 2.2, 95% CI 1.1 to 4.3). Of 47 women positive for chlamydia at baseline, 12 (25.5%, 95% CI 13.9% to 40.3%) had redetected infection at a median of 16 months follow-up. Taking into account follow-up time (65 person-years), the annual redetection rate was 18.5 per 100 person-years (95% CI 9.9 to 30.0 per 100 person-years). Conclusions: One in four women with chlamydia infection at baseline retested positive, supporting recent recommendations to routinely retest chlamydia positives.
AB - Objective: To investigate the frequency and risk factors for incident and redetected Chlamydia trachomatis infection in sexually active, young, multi-ethnic women in the community. Design: Cohort study. Setting: 20 London universities and Further Education colleges. Participants: 954 sexually experienced women, mean age 21.5 years (range 16-27), 26% from ethnic minorities, who were recruited to the Prevention of Pelvic Infection (POPI) chlamydia screening trial between 2004 and 2006, and returned repeat postal self-taken vaginal swabs 11-32 (median 16) months after recruitment. Results: The estimated annual incidence of chlamydia infection among 907 women who tested negative at baseline was 3.4 per 100 person-years (95% CI 2.5 to 4.6 per 100 person-years), but 6.6 per 100 person-years (95% CI 4.5 to 9.3 per 100 person-years) in the 326 teenagers (<20 years). Predictors of incident chlamydia infection were age <20 years (relative risk (RR) 4.0, 95% CI 2.1 to 7.5), and (after adjusting for age) a new sexual partner during 12 months follow-up (RR 4.4, 95% CI 2.0 to 9.9), smoking (RR 2.2 95% CI 1.2 to 3.9), concurrent bacterial vaginosis (RR 2.0 95% CI 1.1 to 3.9) and high risk carcinogenic human papillomavirus (RR 2.2, 95% CI 1.1 to 4.3). Of 47 women positive for chlamydia at baseline, 12 (25.5%, 95% CI 13.9% to 40.3%) had redetected infection at a median of 16 months follow-up. Taking into account follow-up time (65 person-years), the annual redetection rate was 18.5 per 100 person-years (95% CI 9.9 to 30.0 per 100 person-years). Conclusions: One in four women with chlamydia infection at baseline retested positive, supporting recent recommendations to routinely retest chlamydia positives.
UR - http://www.scopus.com/inward/record.url?scp=84910681304&partnerID=8YFLogxK
U2 - 10.1136/sextrans-2014-051607
DO - 10.1136/sextrans-2014-051607
M3 - Article
C2 - 25100744
AN - SCOPUS:84910681304
VL - 90
SP - 524
EP - 528
JO - Sexually Transmitted Infections
JF - Sexually Transmitted Infections
SN - 1368-4973
IS - 7
ER -