The data in this report is for Calendar Year 2001. One exception is that some HMOs submitted 2000 data for several of the measures, which is allowable under National Committee for Quality Assurance (NCQA) rules. These measures include: the Comprehensive Diabetes Care measures, Childhood Immunizations, Timely Initiation of Prenatal Care, Screening for Breast Cancer, Screening for Cervical Cancer, Controlling High Blood Pressure, and Follow-up After Hospitalization for Mental Health. Much of the data in the report is risk-adjusted. Please refer to the Technical Report for a full description of this methodology.
Inpatient hospital and ambulatory procedure data used in the analysis of treatment measures were submitted to PHC4 by Pennsylvania hospitals. The source of data reported the Staying Healthy prevention measures, as well as for the mental health measures, is Quality Compass ® and is used with permission of the National Committee for Quality Assurance (NCQA). Quality Compass ® is a registered trademark of NCQA. NCQA, an independent organization that reports information about managed care plans, was also the source of the Health Plan Employer Data and Information Set ® (HEDIS). The member satisfaction measures were taken from the Consumer Assessment of Health Plans Survey ® (CAHPS).
This report is not intended to be a sole source of information in making choices about HMO plans since the measures included are important, but limited, indicators of quality. Hospital admissions, complications and rehospitalizations are sometimes unavoidable consequences of a patient's medical condition. Hospitals, physicians and health insurance plans may do everything right and still the patient may experience problems.
In addition, an HMO's success in helping members to manage health problems depends in part upon members' willingness and ability to comply with their providers' treatment decisions. While HMOs play an important role in the delivery of care, it is hospitals and doctors who ultimately provide health care for patients.
This report may not provide exact comparisons for several reasons. Benefit plan designs differ among and within HMOs. Enrollment in HMOs is constantly changing. Furthermore, since this report includes data from only one year, it is only a snapshot of what occurred during a limited period of time. Finally, PHC4's risk-adjustment model may not completely capture some groups at higher risk due to social and/or behavioral differences.
HMOs included in this report verified that they were the primary insurer for the hospitalization data analyzed in this report.
Because the methods to compare health plans continue to be developed, this report addresses a limited number of indicators that are not intended to represent an HMO's overall performance. As with any new initiative, these data should be interpreted with caution.
PHC4 would like to emphasize that this report is about helping people make more informed choices and stimulating a quality improvement process where differences in important health care measures are identified and appropriate questions are raised and answered.
PHC4 compiles "expected" rates for many of the measures in this report based on a complex mathematical formula that assesses the degree of illness or risk for patients. In other words, HMOs that have sicker members or a higher percentage of high-risk members are given "credit" in the formula; more patients can be expected to be admitted to the hospital, have longer lengths of stay, be readmitted, or have greater potential for complications because they are more seriously ill or at greater risk. Age and sex adjustments are also applied to some measures. A full description of these methods can be found in the HMO Technical Report.
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