Cost-sharing: a blunt instrument.

Area of Science:

• Health Economics
• Health Services Research
• Public Health Policy

Background:

• Cost-sharing, a health care cost-containment strategy, involves patients paying a portion of service costs.
• While intended to curb non-cost-effective care, it may compromise insurance's financial protection and access benefits.

Purpose of the Study:

• To review empirical evidence on the effects of health care cost-sharing.
• To analyze impacts on utilization, expenditures, health outcomes, and adverse consequences.
• To examine how these effects differ across care types, patient health status, and sociodemographics.

Main Methods:

• Systematic review of empirical studies published since the mid-1980s.
• Analysis of cost-sharing's impact on healthcare utilization and patient expenditures.
• Assessment of effects on health status and identification of adverse consequences.

Main Results:

• Some cost-sharing measures, like emergency department copayments, effectively reduce utilization without apparent harm.
• Other forms of cost-sharing can decrease the use of valuable care, particularly maintenance medications for chronically ill patients.
• Impacts of cost-sharing vary significantly based on the type of care, patient health status, and sociodemographic factors.

Conclusions:

• Cost-sharing should be implemented cautiously, balancing cost containment with patient access and financial protection.
• Care must be taken to avoid reducing utilization of highly cost-effective services, especially for vulnerable populations.
• Policymakers should consider differential impacts when designing cost-sharing policies.