Table 1.

Definitions of Population, Gold Standard and Comparison Methods for Each of Three Aims

Aim	Gold Standard	Comparison Method	Population Included in Analysis
Validity of HEDIS to define the sexually active population	Self-report: Reported vaginal sex with a man in 2009	HEDIS: ICD, CPT, NDC, and HCPCS claim codes or visits for pregnancy, contraception, STD diagnosis, screening or treatment, or cervical cancer screening in 2009 administrative medical record	Women whose administrative medical record indicated they had ≥1 GH visit in 2009
Agreement between HEDIS and self-reported chlamydia testing	None	Self-report: Reported being tested for chlamydia either within plan or outside plan in 2009 HEDIS: ≥1 recorded chlamydia test in 2009 administrative medical record	Women who self-reported being sexually active in 2009
Validity of self-reported chlamydia testing	HEDIS: ≥1 recorded chlamydia test in 2009 administrative record	Self-report: Reported being tested for chlamydia within GH in 2009	Women who self-report being sexually active in 2009 and did not report being tested for chlamydia outside GH in 2009

Abbreviations: CPT, Current Procedure Terminology; HEDIS, Health Effectiveness Data and Information Set; HCPCS, Healthcare Common Procedure Coding System; ICD, International Classification of Diseases; NDC, National Drug Code; STD, sexually transmitted disease