Medical Monitoring Project
MMP was initiated by CDC in 2005 in response to the Institute of Medicine (IOM) report Measuring What Matters: Allocation, Planning, and Quality Assessment for the Ryan White CARE Act, which described a need for representative data on the care and preventive service needs of individuals with HIV in the United States (CDC, 2012e; IOM, 2004). MMP utilizes a repeated (annual) cross-sectional design to obtain data from a national probability sample of HIV-diagnosed adults in care to
MMP is the only study since HCSUS (Bozzette et al., 1998; RAND, 2011) that is designed to be nationally representative of HIV-diagnosed adults in care in the United States. Whereas MMP employs a cross-sectional design, however, HCSUS was a prospective study that followed a cohort of individuals in care for HIV over time (RAND, 2011). MMP is conducted through cooperative agreements between CDC’s Division of HIV/AIDS Prevention-Surveillance and Epidemiology and state and local health departments in participating MMP project areas (CDC, 2012c).
Current Sampling Methodology
MMP uses three-stage, probability proportionate to size sampling for the selection of (1) project areas, (2) facilities that provide outpatient HIV medical care in selected project areas, and (3) HIV-infected adults who receive medical care at selected facilities (Figure 3-1). A similar sampling methodology was used in HCSUS to identify a cohort of people with HIV in care. The national population of inference for each MMP data collection cycle is HIV-infected adults age ≥18 years who received care from known providers of HIV medical care in the United States during a predefined population definition period (PDP).2 The PDP has been January 1 through
2For local estimates in MMP project areas, the population of inference is HIV-infected adults who received care from known providers of HIV care in the project area during the population definition period (CDC, 2012c).