Table 4.
Mean scores and ANOVAs (F) for highest and lowest tertile levels of external control (Mastery Scale) for FM and HC groups. Note that low Mastery Scale level means high external control level
| Characteristic | Group | Mastery level | F | ANOVA P-value |
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|---|---|---|---|---|---|---|---|
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| |||||||
| Highest | Lowest | ||||||
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| Mean | SD | Mean | SD | ||||
| Pain | FM | 5.96 | 2.22 | 7.17 | 2.63 | 2.63 | NS |
| (FIQ) | HC | 0.08 | 0.29 | 0.75 | 0.96 | 3.90 | <0.05 |
| Fatigue | FM | 7.29 | 2.48 | 8.67 | 1.84 | 3.36 | <0.05 |
| (FIQ) | HC | 2.50 | 1.92 | 3.23 | 2.80 | 1.11 | NS |
| Sleep | FM | 7.00 | 2.25 | 8.73 | 1.87 | 5.47 | <0.01 |
| (FIQ) | HC | 3.00 | 2.17 | 4.38 | 3.23 | 1.6 | NS |
| Confusion | FM | 8.04 | 4.98 | 12.79 | 4.55 | 7.57 | <0.01 |
| (POMS) | HC | 2.92 | 1.78 | 10.00 | 6.73 | 4.79 | <0.05 |
| Stress | FM | 23.91 | 4.90 | 33.10 | 4.45 | 27.38 | <0.001 |
| (PSS) | HC | 18.83 | 4.55 | 29.15 | 6.67 | 13.02 | <0.001 |
| Depression | FM | 5.74 | 2.02 | 20.90 | 2.80 | 12.67 | <0.001 |
| (POMS) | HC | 3.45 | 0.79 | 22.75 | 3.47 | 5.31 | <0.05 |
| Anxiety | FM | 8.75 | 2.85 | 15.48 | 2.97 | 5.97 | <0.01 |
| (POMS) | HC | 4.95 | 1.38 | 14.75 | 2.45 | 6.14 | <0.05 |
Abbreviations: ANOVA, analysis of variance; FIQ, Fibromyalgia Impact Questionnaire; FM, fibromyalgia; HC, healthy controls; POMS, Profile of Mood States; PSS, Perceived Stress Scale; SD, standard deviation.