Testing and quantifying association in binary data.

Care 2007; 33: 177–182. 14 National Chlamydia Screening Steering Group (NCSSG). First Steps: Annual Report of the National Chlamydia Screening Programme in England, 2003/2004. London, UK: Department of Health, 2004. 15 National Chlamydia Screening Steering Group (NCSSG). Looking Back, Moving Forward: Annual Report for the National Chlamydia Screening Programme in England, 2004/05. London, UK: Department of Health, 2005. 16 National Chlamydia Screening Steering Group (NCSSG). New Frontiers: Annual Report of the National Chlamydia Screening Programme in England 2005/2006. London, UK: Health Protection Agency, 2006. 17 Jones K, Webb A, Mallinson H, Birley H. Outreach health adviser in a community clinic screening programme improves management of genital chlamydia infection. Sex Transm Infect 2002; 78: 101–105. 18 Poulin C, Alary M, Bernier F, Carbonneau D, Boily M, Joly JR. Prevalence of Chlamydia trachomatis and Neisseria gonorrhoeae among at-risk women, young sex workers, and street youth attending community organizations in Quebec City, Canada. Sex Transm Dis 2001; 28: 437–443. 19 Macleod J, Holloway A, Morcom A, Hobbs FDR, Salisbury C, Patel R, et al. Coverage and uptake of systematic postal screening for genital Chlamydia trachomatis and prevalence of infection in the United Kingdom general population: cross sectional study. BMJ 2005; 330: 940–942. 20 Novak DP, Edman AC, Jonsson M, Karlson RB. The internet, a simple and convenient tool in Chlamydia trachomatis screening of young people. Euro Surveill 2003; 8: 171–176. 21 Sripada S, Logan S, McGillivray S, Mckenzie H, Templeton A, Hamilton M, et al. Opportunistic screening for Chlamydia trachomatis in men attending three different secondary health care settings. Sex Transm Infect 2007; 83: 282–285. 22 Jones CA, Knaup RC, Hayes M, Stoner BP. Urine screening for gonococcal and chlamydial infections at community-based organizations in a high-morbidity area. Sex Transm Dis 2000; 27: 146–151. 23 Sternberg P, Hubley J. Evaluating men’s involvement as a strategy in sexual and reproductive health promotion. Health Promot Int 2004; 19: 389–396. 24 Fenton KA. Screening men for Chlamydia trachomatis infection: have we explored the possibilities? Commun Dis Public Health 2000; 3: 86–89. 25 Hart G, Duncan B, Fenton KA. Chlamydia screening and sexual health. Sex Transm Infect 2002; 78: 396–397.