Table 3 Correlation between Pain Recorder and questionnaire scores for assessing construct validity
Pair of variable | Spearman’s correlation coefficient (r) | P value |
|---|---|---|
1. Baseline questionnaire pain intensity & Pain Recorder pain intensity first 1–3 a days (n = 20) | 0.79 | < 0.0001 |
2. Baseline questionnaire pain interference & Pain Recorder pain interference first 1–3 a days (n = 20) | 0.60 | 0.005 |
3. Baseline questionnaire mood & Pain Recorder mood first 1–3 a days (n = 20) | 0.27 | 0.27 |
4. Baseline questionnaire “staying asleep” & Pain Recorder “staying asleep” first 1–3 a days (n = 14) | 0.22 | 0.45 |
5. Follow-up questionnaire pain intensity & Pain Recorder pain intensity last 1–3 a days (n = 18) | 0.92 | < 0.0001 |
6. Follow-up questionnaire pain interference & Pain Recorder pain interference last 1–3 a days (n = 18) | 0.40 | 0.11 |
7. Follow-up questionnaire mood & Pain Recorder mood last 1–3 a days (n = 18) | 0.15 | 0.56 |
8. Follow-up questionnaire “staying asleep” & Pain Recorder “staying asleep” last 1–3 a days (n = 15) | 0.53 | 0.04 |