Disentangling screening and diagnostic Chlamydia test positivity among females testing at title x-funded and adolescent health clinics, san francisco 2009.

By using a reason-for-test code, we compared positivity for female chlamydia and gonorrhea. At family planning clinics, there were no statistically significant differences in screening versus diag- nostic positivity for either chlamydia or gonorrhea among women. However, at adolescent health clinics, diagnostic positivity was higher than screening positivity for chlamydia and gonorrhea.