An algorithmic approach to thyroid function testing in a managed care setting. 3-year experience

Area of Science:

• Clinical Chemistry
• Endocrinology
• Health Services Research

Background:

• Thyroid function testing is crucial for diagnosing and managing endocrine disorders.
• Previous thyroid testing protocols could lead to unnecessary procedures and increased healthcare costs.
• The need for efficient and cost-effective diagnostic algorithms in large patient populations is well-established.

Purpose of the Study:

• To evaluate the impact of a directed thyroid testing algorithm (DRTSH) on test utilization, cost, and efficiency.
• To assess physician acceptance and the effectiveness of the DRTSH in a large outpatient setting.

Main Methods:

• Implementation of a directed thyrotropin (TSH) and directed thyroid testing algorithm (DRTSH) in 1990.
• The algorithm initiated with sensitive TSH measurement, followed by free thyroid index (T4 x Resin Uptake Ratio) if TSH was outside the normal range (< 0.4 or > 5.5 mU/L).
• Evaluation conducted in a large, predominantly outpatient, prepaid healthcare population.

Main Results:

• High physician acceptance (>90%) of the DRTSH was observed three years post-implementation.
• Significant reductions in overall thyroid test utilization were achieved.
• Decreased test turnaround times and demonstrable cost savings were reported.

Conclusions:

• The directed thyroid testing algorithm (DRTSH) is an effective strategy for optimizing thyroid function testing in outpatient settings.
• This algorithm successfully reduces unnecessary testing, leading to improved resource allocation and significant cost reductions.
• The DRTSH demonstrates high physician acceptance and contributes to more efficient healthcare delivery.