The Tokuhashi score: effectiveness and pitfalls

Area of Science:

• Oncology
• Orthopedic Surgery
• Medical Statistics

Background:

• Accurate survival estimation is crucial for treating metastatic spine disease.
• The modified Tokuhashi score (mTS) is widely used but doesn't account for new therapies, impacting its accuracy.
• This review assesses the mTS's predictive ability nearly a decade after its introduction.

Purpose of the Study:

• To evaluate the accuracy of the modified Tokuhashi score (mTS) in predicting survival for patients with metastatic spine disease.
• To assess the mTS's performance in different survival groups (less than 6 months, 6-12 months, more than 12 months).
• To identify trends in mTS accuracy over time.

Main Methods:

• A comprehensive literature review was performed.
• Ten studies comprising 1686 patients were analyzed.
• The predictive accuracy of the mTS was calculated for overall survival and specific survival intervals.

Main Results:

• The overall predictive accuracy of the mTS was 63.00%.
• Accuracy was highest for patients with >12 months survival (77.21%) and lowest for those with 6-12 months survival (55.32%).
• A statistically significant decrease in mTS accuracy over time was observed for patients with <6 and 6-12 months estimated survival.

Conclusions:

• The mTS is reliable for patients with a good prognosis but less accurate for those with shorter survival estimates (<12 months).
• The declining accuracy of the mTS suggests its utility may diminish over time.
• New predictive instruments are needed to aid treatment decisions for metastatic spine disease patients.