Table 4.
Brief Pain Inventory item scores within the sample and the IQ-BTP classes, analysis of variance results, and Spearman rank correlation
| BPI and QoL items | Samplea | IQ-BTP classesa | ANOVA P value* | Spearman rank correlation ( value)b | |
|---|---|---|---|---|---|
| Potential-BTcP | No-BTcP | ||||
| Worst pain | 4.8 (4.6–5.0) | 6.4 (6.1–6.6) | 4.2 (4.0–4.5) | 0.000 | 0.348 Mild |
| Least pain | 1.5 (1.4–1.6) | 1.8 (1.6–2.0) | 1.4 (1.2–1.5) | 0.004 | 0.156 Poor |
| Mean pain | 2.9 (2.7–3.0) | 3.5 (3.3–3.7) | 2.6 (2.5–2.8) | 0.000 | 0.233 Mild |
| Actual pain | 2.1 (1.9–2.2) | 2.5 (2.3–2.8) | 1.9 (1.7–2.1) | 0.000 | 0.179 Poor |
| Dynamic pain | 3.9 (3.7–4.1) | 5.3 (5.0–5.7) | 3.3 (3.1–3.6) | 0.000 | 0.324 Mild |
| Pain relief with therapy (%) | 70.1 (68.3–71.8) | 65.8 (63.2–68.5) | 71.7 (69.5–73.9) | 0.004 | 0.165 Poor |
| QoL items (pain Interference with…) | |||||
| General activity | 3.7 (3.5–4.0) | 4.7 (4.4–5.1) | 3.4 (3.1–3.6) | 0.000 | 0.214 Mild |
| Mood | 3.8 (3.6–4.0) | 4.7 (4.3–5.0) | 3.5 (3.2–3.7) | 0.000 | 0.202 Mild |
| Ambulation | 3.3 (3.1–3.5) | 4.0 (3.5–4.4) | 3.1 (2.8–3.3) | 0.001 | 0.135 Poor |
| Work | 3.8 (3.6–4.1) | 4.6 (4.2–5.0) | 3.6 (3.3–3.9) | 0.000 | 0.152 Poor |
| Social interactions | 2.9 (2.7–3.1) | 3.5 (3.2–3.9) | 2.7 (2.5–2.9) | 0.000 | 0.161 Poor |
| Sleep | 2.6 (2.4–2.8) | 2.9 (2.9–3.7) | 3.3 (2.1–2.6) | 0.000 | 0.174 Poor |
| Enjoyment of life | 3.5 (3.3–3.7) | 4.4 (4.0–4.8) | 3.2 (2.9–3.4) | 0.000 | 0.197 Poor |
ANOVA Analysis of variance, BPI Brief Pain Inventory, QoL quality of life
*Statistical significance P < 0.001 for all items
aNo-BTcP class: patients who have < 5 of the prerequisite elements and therefore do not have BTcP; Potential-BTcP class: those who have all of the prerequisite elements and potentially experience BTcPBPI. Values are presented as the mean score with the 95% confidence interval (CI) in parenthesis
bFor the Spearman rank correlation between BPI items and the IQ-BTP classes, results are expressed as the absolute values