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Table 1 Controlled studies on interventions aimed at improving chlamydia screening in primary care.

From: Interventions for increasing chlamydia screening in primary care: a review

Study Setting Intervention (duration of follow-up for testing rates) Design Target population Outcomes in the intervention group Outcomes in the control group P value for difference
Verhoeven et al.10 36 GPs in Antwerp, Belgium Educational package (video and text) on communication skills for sexual history taking (15 weeks) Cluster randomized Females patients aged <35 years 18 GPs. Median no. of females appropriately tested per GP = 6 18 GPs. Median no. of females appropriately tested per GP = 3 0.035
Shafer et al.12 10 Pediatric clinics in North Carolina Multifaceted, system-level changes to clinical practice to overcome barriers to chlamydia screening (18 months) Randomized Female patients aged 14–18 years 5 clinics. 478/1017 (47%) of eligible girls screened 5 clinics. 203/1194 (17%) of eligible girls screened <0.001
Armstrong et al.13 2 primary health centres in Scotland Introduction of a health advisor to increase awareness and to provide training on chlamydia screening guidelines (6 months) Non-randomized Males and female patients aged 15–24 years 1 health centre.
No. of chlamydia tests*:
Pre-intervention: 152
Post-intervention: 335
1 health centre.
No. of chlamydia tests*:
Pre-intervention: 336
Post-intervention: 374
Allison et al.14 191 primary care physician offices in the US Internet based continuous medical education on chlamydia screening (2 years) Randomized Female patients aged 16–26 years 95 offices. Screening rates:
Pre-intervention: 16.2%
During intervention: 13.3%
Post-intervention: 15.5%
96 offices. Screening rates:
Pre-intervention: 18.9%
During intervention: 13.0%
Post-intervention: 12.4%
  1. *Denominator values are not available. The numbers of tests quoted are for all ages.
  2. p value is for post intervention differences after adjusting for baseline performance.