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Testing for Chlamydia trachomatis: time trends in positivity rates in the canton of Basel-Stadt, Switzerland.

Schmutz C, Burki D, Frei R, Mäusezahl-Feuz M, Mäusezahl D - Epidemiol. Infect. (2012)

Bottom Line: Test year was significantly associated with test outcome in the multivariable analysis but no time trend was observed.CT positivity did not change over the past 9 years in Basel-Stadt.In contrast to other European countries without CT screening, we found no evidence that the observed increase of Chlamydia cases in the national notification system represents an epidemiological trend, but rather results from an increased testing frequency.

View Article: PubMed Central - PubMed

Affiliation: Swiss Tropical and Public Health Institute, Basel, Switzerland.

ABSTRACT
National health statistics report a 2·5-fold increase in laboratory-confirmed Chlamydia trachomatis (CT) cases over the last decade in Switzerland where no CT screening programme exists. We obtained essential denominator information to describe the epidemiology of CT in the canton of Basel-Stadt, an urban canton in north-western Switzerland. Laboratories reporting at least two CT infections from Basel-Stadt residents to the SFOPH in 2010 provided demographic and test-related data. CT positivity rates were calculated for 2002–2010. The influences of test year, age, sex and laboratory on CT positivity were investigated in a multivariable model. Positivity differed between sexes and age groups. In our sample of 32 034 records, female and male CT positivity rates were 4·7% and 11·1%, respectively. Test year was significantly associated with test outcome in the multivariable analysis but no time trend was observed. CT positivity did not change over the past 9 years in Basel-Stadt. In contrast to other European countries without CT screening, we found no evidence that the observed increase of Chlamydia cases in the national notification system represents an epidemiological trend, but rather results from an increased testing frequency.

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Time trend in Chlamydia positivity rates in laboratories, by sex. Rates adjusted for age using direct standardization.
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fig03: Time trend in Chlamydia positivity rates in laboratories, by sex. Rates adjusted for age using direct standardization.

Mentions: CT was detected in 821/17558 female samples (4·7%) and in 317/2849 male samples (11·1%). Figure 3 shows the time trend in positivity rates for sex and laboratory. In both private and public sector laboratories, positivity rates were stable between 2002 (2008) and 2010. However, the positivity rate in the public hospital laboratories was lower than in the private laboratories.Fig. 3.


Testing for Chlamydia trachomatis: time trends in positivity rates in the canton of Basel-Stadt, Switzerland.

Schmutz C, Burki D, Frei R, Mäusezahl-Feuz M, Mäusezahl D - Epidemiol. Infect. (2012)

Time trend in Chlamydia positivity rates in laboratories, by sex. Rates adjusted for age using direct standardization.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3757368&req=5

fig03: Time trend in Chlamydia positivity rates in laboratories, by sex. Rates adjusted for age using direct standardization.
Mentions: CT was detected in 821/17558 female samples (4·7%) and in 317/2849 male samples (11·1%). Figure 3 shows the time trend in positivity rates for sex and laboratory. In both private and public sector laboratories, positivity rates were stable between 2002 (2008) and 2010. However, the positivity rate in the public hospital laboratories was lower than in the private laboratories.Fig. 3.

Bottom Line: Test year was significantly associated with test outcome in the multivariable analysis but no time trend was observed.CT positivity did not change over the past 9 years in Basel-Stadt.In contrast to other European countries without CT screening, we found no evidence that the observed increase of Chlamydia cases in the national notification system represents an epidemiological trend, but rather results from an increased testing frequency.

View Article: PubMed Central - PubMed

Affiliation: Swiss Tropical and Public Health Institute, Basel, Switzerland.

ABSTRACT
National health statistics report a 2·5-fold increase in laboratory-confirmed Chlamydia trachomatis (CT) cases over the last decade in Switzerland where no CT screening programme exists. We obtained essential denominator information to describe the epidemiology of CT in the canton of Basel-Stadt, an urban canton in north-western Switzerland. Laboratories reporting at least two CT infections from Basel-Stadt residents to the SFOPH in 2010 provided demographic and test-related data. CT positivity rates were calculated for 2002–2010. The influences of test year, age, sex and laboratory on CT positivity were investigated in a multivariable model. Positivity differed between sexes and age groups. In our sample of 32 034 records, female and male CT positivity rates were 4·7% and 11·1%, respectively. Test year was significantly associated with test outcome in the multivariable analysis but no time trend was observed. CT positivity did not change over the past 9 years in Basel-Stadt. In contrast to other European countries without CT screening, we found no evidence that the observed increase of Chlamydia cases in the national notification system represents an epidemiological trend, but rather results from an increased testing frequency.

Show MeSH
Related in: MedlinePlus