Table 1.
Participant Characteristics by Group
| HC (n=19) | RA (n=18) | FM (n=18) | ||||||
|---|---|---|---|---|---|---|---|---|
| Characteristics (units) | M or n | SD or % | M or n | SD or % | M or n | SD or % | F / χ2 | comparisons |
| Age (years) | 46.68 | 14.14 | 44.67 | 14.32 | 49.44 | 9.62 | 0.62 | |
| Sex (% Female) | 15 | 79% | 15 | 83% | 16 | 89% | 0.67 | |
| Race (% Caucasian) | 17 | 89% | 14 | 78% | 16 | 89% | 1.27 | |
| Marital Status (% Married) | 9 | 47% | 7 | 39% | 8 | 44% | 0.28 | |
| Employed (% full or part-time) | 11 | 58% | 10 | 56% | 8 | 44% | 0.76 | |
| Years of Education | 15.79 | 2.80 | 14.67 | 2.11 | 15.13 | 4.27 | 0.60 | |
| Body Mass Index (kg /m2) | 23.63 | 3.79 | 26.26 | 4.00 | 25.16 | 4.88 | 1.80 | |
| Systolic Blood Pressure (mmHg) | 118.17 | 18.85 | 118.47 | 18.32 | 115.83 | 18.53 | 0.10 | |
| Diastolic Blood Pressure (mmHg) | 74.36 | 13.60 | 73.41 | 10.28 | 69.45 | 8.34 | 0.92 | |
| Positive Tender-points (# painful sites) | 4.83 | 3.94 | 10.78 | 5.07 | 16.89 | 1.71 | 45.10* | FM>RA>HC |
| Fibromyalgia Impact Questionnaire (0–100) | 14.02 | 13.02 | 36.22 | 21.94 | 55.02 | 18.57 | 23.72* | FM>RA>HC |
| Current Pain, MPQVAS (0–100) | 1.53 | 2.65 | 27.78 | 19.55 | 47.83 | 22.40 | 34.30* | FM>RA>HC |
| Psychological Distress, SCL-90 (0–4) | 1.41 | 0.53 | 1.44 | 0.61 | 1.91 | 0.48 | 4.97* | FM>RA, FM>HC |
| General Health Perception, SF-36 (0–100) | 86.05 | 11.25 | 55.00 | 23.95 | 44.44 | 24.96 | 20.02* | FM<HC, RA<HC |
| Pain Catastrophizing, PCS (0–52) | 12.53 | 9.40 | 15.72 | 12.31 | 22.11 | 13.07 | 3.22* | FM>HC |
Note:
*
p<.05;
comparisons noted in the last column are statistically significant at p<.05.
HC = healthy pain-free controls; RA= rheumatoid arthritis; FM = fibromyalgia.