Imperial College London


Faculty of MedicineSchool of Public Health

Clinical Senior Lecturer in Epidemiology



+44 (0)20 7594 8994bethan.davies06




Medical SchoolSt Mary's Campus






BibTex format

author = {Chandrasekaran, L and Davies, B and Eaton, J and Ward, H},
doi = {10.1136/sextrans-2015-052441},
journal = {Sexually Transmitted Infections},
pages = {226--228},
title = {Chlamydia diagnosis rate in England in 2012: an ecological study of local authorities},
url = {},
volume = {93},
year = {2016}

RIS format (EndNote, RefMan)

AB - Objectives Local authorities (LAs) in England commission chlamydia screening as part of the National Chlamydia Screening Programme. It is recommended that LAs achieve a chlamydia diagnosis rate of ≥2300 cases per 100000 population aged 15–24. We describe national patterns in attainment of the chlamydia diagnosis rate recommendation and possible implications of using it to measure LA-level performance.Methods We used publicly available data sets from England (2012) to explore the association between LAs attaining the recommended chlamydia diagnosis rate and population size, socioeconomic deprivation, test setting and sex.Results We used data from 1197121 recorded chlamydia tests in females and 564117 in males. The chlamydia diagnosis rate recommendation was achieved by 22% (72/324) of LAs overall (43% female population; 8% male population). LAs in the highest deprivation quintile were more likely to reach the recommendation than those in the least-deprived quintile for both sexes (women: unadjusted prevalence ratio (UPR) 7.43, 95% CI 3.65 to 15.11; men: UPR 7.00, 95% CI 1.66 to 29.58). The proportion of tests performed in genitourinary medicine clinics was negatively associated with attainment of the recommended diagnosis rate (UPR 0.95, 0.93 to 0.97).Conclusions Chlamydia diagnosis rate recommendations that reflect local area deprivation (as a proxy for disease burden) may be more appropriate than a single national target if the aim is to reduce health inequalities nationally. We suggest LAs monitor their chlamydia diagnosis rate, test coverage and test positivity across a range of measures (including setting and sex) and pre/post changes to commissioned services. Critical evaluation of performance against the recommendation should be reflected in local commissioning decisions.
AU - Chandrasekaran,L
AU - Davies,B
AU - Eaton,J
AU - Ward,H
DO - 10.1136/sextrans-2015-052441
EP - 228
PY - 2016///
SN - 1472-3263
SP - 226
TI - Chlamydia diagnosis rate in England in 2012: an ecological study of local authorities
T2 - Sexually Transmitted Infections
UR -
UR -
VL - 93
ER -