TABLE 1.

Hundred and thirty-four covariates retained in the analytic dataset

X(0) :	Baseline demographics age, sex,race (6 indicators), language (4 indicators)
$\tilde{X}(t)$ :	Health care utilization during past 1 year and past 2 years
	number of medical encounters, top quartile usage (yes/no), EHR data recorded, HIV counseling
	Number of tests and number of positive tests in past 1 year and past 2 years
	gonorrhea, chlamydia, syphilis, hepatitis B antibody, hepatitis B DNA, hepatitis C antibody, hepatitis C RNA, HIV ELISA test, HIV RNA test
	Diagnoses in past 1 year, 2 years (yes/no)
	syphilis, nongonococcal urethritis, herpes, anogenital warts, anorectal ulcer, pelvic inflammatory disease, venereal disease, anorexia, bulimia, eating disorder, alcohol dependence, opioid dependence, drug dependence, gonorrhea, chlamydia, syphilis, herpes, substance abuse
	Prescriptions in past 1 and/or 2 years
	bicillin, azithromycin, ceftriaxone, methadone, suboxone, cialis/viagra/levitra
Z(t) :	Indicators of ever diagnosed for each condition listed above
	Indicators of ever prescribed for each drug listed above
	high risk sexual behavior, possible transgender, possible homosexual, possible transgender, possible injectable drug use, possible at risk woman, years of available data