National Chlamydia Screening
Programme
Chlamydia testing and diagnoses in 15-24 year
olds, England
January – December 2014
CTAD Team
HIV & STI Department
National Infection Service
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Notes ❶ ❷ ❸
• Chlamydia activity data published by PHE are based on primary care and community service
chlamydia data from Chlamydia Testing Activity Dataset (CTAD), and GUM clinic chlamydia
data from GUMCAD.
• CTAD collects data on all NHS and local authority commissioned chlamydia tests carried out
in laboratories in England.
• Data are presented by upper tier local authority of patient residence and aggregated up to
PHE centre area and the England total.
• Data are attributed to local authorities using the patient’s postcode of residence. If this is not
provided, other reported location data are used in this order: patient GP postcode; postcode
of testing service; patient GP code; NCSP clinic code.
• Accurate attribution of tests by local authority is only possible if a valid postcode of residence
is submitted to PHE. The proportion of non-GUM records with a valid patient postcode has
increased from 66% in 2012 to 84% in 2014.
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Public Health England: 2014 NCSP Slide Set
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Notes ❶ ❷ ❸
• CTAD data from GUM clinics reported by laboratories has been removed and replaced with
GUM clinic data sourced from GUMCAD. This is because, unlike CTAD sourced GUM data,
GUMCAD data contains information on patient area of residence.
• This data substitution relies on accurate coding of testing service type by laboratories
reporting CTAD data. Inaccurate coding may lead to over or under counting of tests.
• Data includes chlamydia tests carried out on people aged 15 to 24 years inclusive.
• Data are cleaned and de-duplicated so one test per patient within a subsequent 42 day
window is counted.
• Data includes tests where sex is male, female, and unknown/unspecified.
• Data includes all screening tests, diagnostic tests and tests on contacts.
• Data do not yet reflect the true volume of internet testing, which only became mandatory from
Q1 2015 onwards. Internet tests prior this date were reported within the ‘other’ category.
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Public Health England: 2014 NCSP Slide Set
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Notes ❶ ❷ ❸
• Data includes chlamydia tests and diagnoses among people accessing services located in
England who are also resident in England. The England total includes tests that did not
have sufficient location information to be attributed to a local authority of residence, but
excludes those with a postcode of residence in Scotland or Wales.
• Data represents the number of tests and diagnoses reported, and not the number of people
tested or diagnosed.
• Data presented are based on tests with confirmed positive and negative results only. Tests
with equivocal, inhibitory and insufficient results have been excluded as most people with
these results are re-tested.
• Rates are calculated using ONS population estimates based upon the 2011 census. Rates
for 2014 have been calculated using 2013 population estimates.
For further information about the NCSP programme please follow this link:
https://www.gov.uk/government/statistics/national-chlamydia-screening-programme-ncsp-datatables
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Public Health England: 2014 NCSP Slide Set
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Glossary
CTAD: Chlamydia Testing Activity Dataset
SRH: Sexual and Reproductive Health Services
DR: Detection rate
GP: General Practice
GUM: Genito-urinary medicine
NCSP: National Chlamydia Screening Programme
ONS: Office for National Statistics
PHE: Public Health England
PHOF: Public Health Outcomes Framework
ToP: Termination of Pregnancy
STIs: Sexually transmitted infections
UTLA: Upper Tier Local Authority
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Public Health England: 2014 NCSP Slide Set
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Chlamydia testing data for 15-24 year olds
Detection rate by PHE centre area and England
January - December 2014
Detection rate per 100,000 population aged 15-24
Detection rate 2012
Detection rate 2013
Detection rate 2014
PHOF detection rate indicator (2,300 per 100,000 population)
3,000
2,500
2,000
1,500
1,000
500
0
East Midlands
East of
England
London
North East
North West
South East
South West West Midlands Yorkshire and
Humber
ENGLAND
PHE centre area
Public Health England: 2014 NCSP Slide Set
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Proportion of positive tests and coverage (%)
40%
Community coverage
Proportion of tests positive
GUM coverage
Detection rate
3000
35%
2500
30%
2000
25%
1500
20%
15%
1000
10%
500
5%
0
0%
Detection rate per 100,000 population aged 15-24
Chlamydia testing data for 15-24 year olds
Coverage, proportion of positive tests and detection rate
by PHE centre area and England
2012, 2013 and 2014
2012 2013 2014 2012 2013 2014 2012 2013 2014 2012 2013 2014 2012 2013 2014 2012 2013 2014 2012 2013 2014 2012 2013 2014 2012 2013 2014 2012 2013 2014
East Midlands East of England
London
West Midlands
North East
North West
South East
South West
Yorkshire and
Humber
ENGLAND
PHE centre area
Public Health England: 2014 NCSP Slide Set
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Chlamydia testing data for 15-24 year olds
Testing coverage by gender
by PHE centre area and England
January - December 2014
Males
Females
15%
34%
12%
38%
16%
12%
North East
36%
North West
31%
12%
35%
12%
35%
14%
40%
30%
20%
34%
10%
0%
10%
20%
30%
South East
South West
West Midlands
30%
14%
London
36%
14%
50%
East of England
32%
17%
East Midlands
40%
Yorkshire and Humber
ENGLAND
50%
Population coverage (%)
Public Health England: 2014 NCSP Slide Set
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Chlamydia testing data for 15-24 year olds
Proportion of positive tests by gender
by PHE centre area and England
January - December 2014
Males
Females
9.3%
8.1%
7.1%
East of England
8.8%
7.3%
London
8.8%
7.4%
North East
9.0%
10.8%
8.5%
9.0%
9.8%
9.9%
11.2%
9.6%
15%
East Midlands
10%
7.1%
South East
7.1%
South West
8.5%
West Midlands
8.4%
Yorkshire and Humber
7.7%
5%
0%
5%
North West
10%
ENGLAND
15%
Porportion of positive tests (%)
Public Health England: 2014 NCSP Slide Set
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Chlamydia testing data for 15-24 year olds
Coverage and detection rate by age group
by PHE centre area and England
January - December 2014
Coverage 20-24 year olds
Detection rate 15-19 year olds
Detection rate 20-24 year olds
PHOF detection rate indicator (2300) per 100,000 population
40%
3,000
35%
2,500
Coverage (%)
30%
2,000
25%
20%
1,500
15%
1,000
10%
500
5%
0%
-
East Midlands
East of
England
London
North East
North West
South East
South West
West
Midlands
Yorkshire and ENGLAND
Humber
Detection rate per 100,000 population aged 15-24
Coverage 15-19 year olds
PHE centre area
Public Health England: 2014 NCSP Slide Set
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Chlamydia testing data for 15-24 year olds
Coverage and detection rate by gender
by PHE centre area and England
January- December 2014
Female coverage 2014
Male DRI 2014
Female DRI 2014
PHOF detection rate indicator (2300)
40%
3,500
35%
3,000
Coverage (%)
30%
2,500
25%
2,000
20%
1,500
15%
1,000
10%
500
5%
-
0%
East
Midlands
East of
England
London
North East North West South East South West
West
Yorkshire ENGLAND
Midlands and Humber
Detection rate per 100,000 population aged 15-24
Male coverage 2014
PHE centre area
Public Health England: 2014 NCSP Slide Set
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Chlamydia testing data for 15-24 year olds
Detection rate by gender and age group
by PHE centre area and England
January - December 2014
Detection rate per 100,000 population aged 15-24
Males 15-19 year olds
Males 20-24 year olds
Females 15-19 year olds
Females 20-24 year olds
3,500
3,000
2,500
2,000
1,500
1,000
500
0
East Midlands
East of
England
London
North East
North West
South East
South West
West
Midlands
Yorkshire and ENGLAND
Humber
PHE centre area
Public Health England: 2014 NCSP Slide Set
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Chlamydia testing data for 15-24 year olds
Detection rate by UTLA in London and England
January - December 2014
Chlamydia detection rate per 100,000 population
<1,900
1,900 - 2,299
≥ 2,300
Public Health England: 2014 NCSP Slide Set
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Chlamydia testing data for 15-24 year olds
Coverage by UTLA in London and England
January – December 2014
Coverage 2014
<20%
20% - 29%
30% - 39%
≥40%
Public Health England: 2014 NCSP Slide Set
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Chlamydia testing data for 15-24 year olds
Tests by testing venue, England
January - December 2014
332,136 (20.3%)
567,345 (34.6%)
GUM
SRH
GP
28,246 (1.7%)
66,270 (4.0%)
Pharmacy
20,819 (1.3%)
ToP
16,723 (1.0%)
Internet
Not known
291,629 (17.8%)
Other
315,877 (19.3%)
Public Health England: 2014 NCSP Slide Set
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Chlamydia testing data for 15-24 year olds
Tests by testing venue and gender, England
January - December 2014
Males
Females
213,290 (44.0%)
353,964 (31.0%)
210,907 (18.5%)
115,594 (23.9%)
21,383 (1.9%)
6,738 (1.4%)
45,786 (4.0%)
20,483 (4.2%)
208 (0.0%)
20,262 (1.8%)
12,463 (1.1%)
4,230 (0.9%)
43,357 (9.0%)
247,417 (21.7%)
80,335 (16.6%)
Public Health England: 2014 NCSP Slide Set
230,284 (20.2%)
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Chlamydia testing data for 15-24 year olds
Proportion of tests by testing venue
by PHE Centre area and England
January - December 2014
Proportion of tests by testing service type
100%
90%
Not known
80%
Other
70%
Internet
60%
ToP
50%
40%
Pharmacy
30%
GP
20%
SRH
10%
GUM
Public Health England: 2014 NCSP Slide Set
ENGLAND
West Midlands
Yorkshire and Humber
PHE centre area
South West
South East
North West
North East
London
East of England
East Midlands
0%
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Chlamydia testing data for 15-24 year olds
Proportion of positive tests
by testing venue and gender, England
January - December 2014
Proportion of positive tests
14%
Male
Female
12%
10%
8%
6%
4%
2%
0%
GUM
SRH
GP
Pharmacy
ToP
Internet
Not known
Other
Testing venue
Public Health England: 2014 NCSP Slide Set
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