Table 4. Correlation Between Global Assessment of Change and Observed Change in Outcomes
CGICΔBPIΔSF12
Patient global impression of change*0.1320.293†−0.249‡
CGIC*0.1660.001
Change in BPI (4 month after baseline)−0.277‡

  • ↵* Lower scores indicate greater improvement.

  • ↵† <.01.

  • ↵‡ <.05.

  • BPI, Brief Pain Inventory; CGIC, clinical global assessment of change; SF12, 12-item Short Form.