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Table 5 Classification of pain index based on diary pain intensity rating and analgesic intake

From: A single arm phase II study of bone-targeted Sn-117 m-DTPA in symptomatic castration-resistant prostate cancer with skeletal metastases

Pain response

Pain index

Diary pain rating change from baseline

Analgesic intake compared with baseline

Complete

1

Decrease ≥ 90%

Stable or reduced

Marked

2

Decrease ≥ 50% to < 90%

Stable or reduced

Moderate

3

Decrease > 33% to < 50%

Stable or reduced

Minimal

4

Decrease ≥ 20% or increase < 33%

Stable

None

5

Decrease < 20% or increase < 20%

Stable

Pain progression

6

Increase ≥ 20%

Stable or increased

Decrease < 20% or increase < 20%

Increased

Decrease ≥ 20%

Increased