Correlation tests for analgesic efficacy
| Analgesic efficacy was not correlated with: |
| -Age of patient (Mann-Whitney test, P = .36 at 6 months) |
| -Sex of patient (Fisher test, P = .58 at 6 months) |
| -Intensity of the initial pain (Mann-Whitney test: P > .9999 at 6 months) |
| -Origin of the cancer (Fisher test: P > .9999 for each type of cancer) |
| -Number of vertebrae treated per procedure (Mann-Whitney test: P = .21 at 6 months) |
| -Filling volume (Mann-Whitney test, P = .368 at 1 month and P = .397 at 6 months) |
Most of the correlation tests were made at 6 months, and the analgesic results are representative (with very few changes at long-term follow-up for the available data).