Table 4.
Effect of kV imaging on pain reduction by fraction number, disease site, and extraosseous disease extension.
| Median of Absolute Pain Reduction | ||||
|---|---|---|---|---|
| kV images <90% | kV images ≥90% | p | ||
| All patients (n = 188 vs 67) | 5 | 6 | 0.07 | |
| All patients with total fraction > 1 (n = 171 vs 58) | 5 | 6 | 0.07 | |
| Site = Spine (n = 86 vs 24) | 5 | 5.5 | 0.86 | |
| Site = Lower extremities (n = 59 vs 26) | 5 | 6.5 | 0.03 | |
| Site = Upper and lower extremities (n = 73 vs 31) |
5 | 6 | 0.05 | |
| Total fractions = 5 (n = 57 vs 24) | 5 | 6.5 | 0.01 | |
| Total fractions ≤5 (n = 78 vs 38) | 4 | 5.5 | 0.05 | |
| Total fractions >5 (n = 110 vs 31) | 5 | 6 | 0.64 | |
| Total fractions = 10 (n = 77 vs 22) | 5 | 6 | 0.74 | |
| Total fractions ≤ 10 (n = 165 vs 61) | 5 | 6 | 0.19 | |
| Total fractions >10 (n = 23 vs 8) | 5 | 7 | 0.41 | |
| Patients with extraosseous disease (n = 112 vs 39) | 5 | 5.5 | 0.37 | |
| Site = Spine (n = 58 vs 20) | 5 | 5.5 | 0.42 | |
| Site = Lower extremities (n = 33 vs 14) | 5 | 5 | 0.08 | |
| Site = Upper and lower extremities (n = 42 vs 18) | 5 | 5 | 0.10 | |
| Total fractions = 5 (n = 34 vs 14) | 4 | 7 | 0.003 | |
| Total fractions = 10 (n = 44 vs 12) | 5 | 6.5 | 0.86 | |
| Patients with total fractions = 1 (n = 13 vs 13) | 2 | 4 | 0.35 | |
The bold values denote p values indicating statistical significance, i.e. p ≤ 0.05.