title: A pragmatic assessment of the relative efficiency of outreach chlamydia screening events conducted in non-clinical settings.
abstract: BACKGROUND
  Opportunistic screening for chlamydia in non-clinical settings is becoming more common, but little is known about which settings (or events) offer the best return on investment. We measured the relative efficiency of each screening site and event during the conduct of a chlamydia education and screening outreach program which used a cash incentive to encourage participation (SOC2).
  
  
  METHODS
  SOC2 staff identified sites and organised events in non-clinical sites where young people were likely to congregate. 16 to 30 years olds were offered chlamydia education and a cash reward of AUD10 if they chose to be screened for chlamydia. Data collected during these activities were used to calculated five measures of efficiency: i) screening yield' (proportion of people providing a sample), ii) proportion of positive tests, iii) 'event screening tempo' (number of screens performed for every hour that screening is offered), iv) 'staff hour screening tempo' (number of screens performed per hour of staff time) and v) 'chlamydia detection tempo' (number of positive tests detected per hour of screening).
  
  
  RESULTS
  3011 people (71% male) were screened during 18 events at 10 venues. Overall 'screening yield' was 43.8% (range: 20-77%) and 1.7% (95% CI: 1.1-3.0) of tests were positive (by event range 1-3%). Overall, the 'event screening tempo' was 23.7 screens per event hour (range 8.0-79.0), the 'staff hour screening tempo' was 6.5 screens per staff hour and the 'chlamydia detection tempo' was 0.4 positive tests per hour (range: 0-1.75).
  
  
  CONCLUSIONS
  Assessing the efficiency of screening sites and programs should be integral to their conduct. We suggest the use of five measures to enable pragmatic assessment of any screening program. We introduce the terms 'event screening tempo', 'staff hour screening tempo' and 'chlamydia detection tempo' to describe three of these simple measures.
authors.affiliation: Academic Unit of Internal Medicine, Australian National University Medical School, Canberra Hospital, PO Box 11, Woden, ACT 2606, Australia.
authors.forename: Francis J
authors.initials: FJ
authors.lastname: Bowden
authors.forename: Marian J
authors.initials: MJ
authors.lastname: Currie
authors.forename: Muareen
authors.initials: M
authors.lastname: Todkill
authors.forename: Mathias
authors.initials: M
authors.lastname: Schmidt
authors.forename: Sue
authors.initials: S
authors.lastname: Webeck
authors.forename: Rendry
authors.initials: R
authors.lastname: Del Rosario
authors.forename: Tim
authors.initials: T
authors.lastname: Bavinton
authors.forename: Alexandra
authors.initials: A
authors.lastname: Tyson
mesh_terms: D000293:Adolescent; D000328:Adult; D002690:Chlamydia Infections / Q000175:diagnosis*; D005260:Female; D006266:Health Education; D006801:Humans; D008297:Male; D008403:Mass Screening / Q000379:methods* / Q000706:statistics & numerical data; D008875:Middle Aged; D009042:Motivation; D015397:Program Evaluation; D055815:Young Adult