Table 2.
Correlations coefficients (Spearman’s Rho) between SicknessQ and concurrent criterion validity measures.
| Mean (SD) | Min-max | Correlation with SicknessQ | |
|---|---|---|---|
| SicknessQ | 8.91 (5.93) | 0–30 | – |
| Self-rated health | 2.69 (0.76) | 1–5 | 0.34∗∗ |
| Physical functioning (SF-12) | 43.89 (6.04) | 0–100 | 0.02 |
| Mental functioning (SF-12) | 47.96 (8.69) | 0–100 | −0.37∗∗ |
| Anxiety (DASS-21 subscale) | 12.18 (4.06) | 7–28 | 0.55∗∗ |
| Depression (DASS-21 subscale) | 12.59 (4.27) | 7–28 | 0.55∗∗ |
| Stress (DASS subscale) | 14.68 (4.06) | 7–28 | 0.56∗∗ |
| Fatigue (Chalder’s) | 19.46 (5.47) | 0–33 | 0.60∗∗ |
| Somatization (PHQ-15) | 17.39 (3.32) | 0–30 | 0.54∗∗ |
| Neuroticism (IPIP) | 9.97 (0.18) | 0–20 | 0.54∗∗ |
| Pain catastrophizing (PCS) | 26.44 (11.40) | 0–52 | 0.32∗∗ |
| Kinesophobia (TSK) | 33.99 (6.26) | 17–68 | 0.38∗∗ |
| GI symptoms (GSRS) | 35.01 (13.04) | 15–105 | 0.35∗∗ |
| Explained variance | 0.62 |
SF-12: Short form scale 12.
DASS-21: Depression, Anxiety and Stress – 21 questionnaire (DASS-21).
PJQ: The Patient Health Questionnaire.
IPIP: The International Personality Item Pool neuroticism scale.
PCS: The Pain Catastrophizing Scale.
TSK: The Tampa Scale of Kinesiophobia.
GSRS: The Gastrointestinal Symptom Rating Scale.
∗p < 0.01, ∗∗p < 0.001.