Table 4.
Convergent validity
| Questionnaires | SBST-TH total score | SBST-TH psychological subscore | ||
|---|---|---|---|---|
| Spearman rank correlation (95% confidence interval) |
p-value | Spearman rank correlation (95% confidence interval) |
p-value | |
| VAS pain intensity | 0.45 (0.30, 0.57) | < 0.001* | 0.39 (0.26, 0.50) | < 0.001* |
| RMDQ | 0.56 (0.43, 0.69) | < 0.001* | 0.49 (0.36, 0.60) | < 0.001* |
| FABQ total | 0.42 (0.29, 0.53) | < 0.001* | 0.33 (0.21, 0.43) | < 0.001* |
| FABQ-PA | 0.35 (0.23, 0.45) | < 0.001* | 0.32 (0.20, 0.44) | < 0.001* |
| FABQ-W | 0.38 (0.26, 0.51) | < 0.001* | 0.29 (0.15, 0.41) | < 0.001* |
| PCS total | 0.41 (0.31, 0.55) | < 0.001* | 0.39 (0.26, 0.51) | < 0.001* |
| PSC rumination | 0.37 (0.24, 0.48) | < 0.001* | 0.35 (0.21, 0.48) | < 0.001* |
| PSC helplessness | 0.37 (0.23, 0.50) | < 0.001* | 0.34 (0.21, 0.47) | < 0.001* |
| PSC Magnification | 0.38 (0.25, 0.50) | < 0.001* | 0.35 (0.21, 0.48) | < 0.001* |
| HADS total | 0.38 (0.25, 0.50) | < 0.001* | 0.35 (0.22, 0.45) | < 0.001* |
| HADS anxiety | 0.34 (0.22, 0.45) | < 0.001* | 0.32 (0.19, 0.44) | < 0.001* |
| HADS depression | 0.32 (0.18, 0.44) | < 0.001* | 0.30 (0.15, 0.43) | < 0.001* |
| EQ-5D-5L | −0.52 (−0.61, −0.40) | < 0.001* | −0.49 (−0.60, −0.38) | < 0.001* |
| EQ-5D VAS | − 0.41 (− 0.51, − 0.30) | < 0.001* | −0.42 (− 0.54, − 0.29) | < 0.001* |
SBST-TH STarT back screening tool-Thai version, VAS Visual analogue scale, RMDQ Roland-Morris disability questionnaire, FABQ Fear-avoidance beliefs questionnaire, FABQ-PA Fear-avoidance beliefs questionnaire about physical activity, FABQ-W Fear-avoidance beliefs questionnaire about work, PCS Pain catastrophising scale, HADS Hospital anxiety and depression scale, EQ-5D-5L EuroQol five-dimensional five-level questionnaire, EQ-VAS EuroQol-visual analogue scale
* p < 0.05