Table 2.
Mean (SD) of outcome variables at pretreatment by experimental condition.
| Range of scale | Control group |
Treatment group |
P for difference | ||||
|---|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | ||||
| Primary outcomes | |||||||
| Pain intensity (composite) | [−] | Z score | 0.03 | 0.99 | −0.03 | 1.01 | .61 |
| Physical functioning (composite) | [−] | Z score | 0.02 | 1.04 | −0.02 | 0.96 | .73 |
| Psychological distress (composite) | [−] | Z score | −0.04 | 0.93 | 0.04 | 1.06 | .54 |
| Coping strategies (composite) | [+] | Z score | 0.08 | 1.01 | −0.08 | 0.99 | .20 |
| Catastrophizing | [−] | 0 to 36 | 7.17 | 6.46 | 6.84 | 6.39 | .68 |
| Self-efficacy | [+] | 1 to 10 | 5.97 | 1.82 | 6.12 | 1.91 | .52 |
| Quality of life | [+] | 16 to 112 | 86.57 | 14.64 | 86.29 | 13.00 | .87 |
| Secondary outcomes | |||||||
| Fatigue | [−] | 0 to 10 | 5.06 | 1.90 | 5.14 | 2.01 | .75 |
| AIMS2 social activities | [−] | 0 to 10 | 5.28 | 1.72 | 5.34 | 1.72 | .77 |
| AIMS2 family/friend support | [−] | 0 to 10 | 2.32 | 2.00 | 2.76 | 2.05 | .08 |
| AIMS2 satisfaction with health | [−] | 0 to 10 | 3.69 | 2.10 | 3.83 | 1.98 | .59 |
| IVR outcomes | |||||||
| Daily pain intensity | [−] | 0 to 10 | 4.81 | 1.80 | 4.63 | 1.78 | .42 |
| Daily pain interference | [−] | 0 to 10 | 3.47 | 1.70 | 3.48 | 1.55 | .96 |
| Daily life satisfaction | [−] | 0 to 10 | 6.46 | 1.52 | 6.34 | 1.44 | .34 |
| Daily canceling activities | [−] | 0 to 1 | 0.33 | 0.34 | 0.32 | 0.31 | .83 |
| Daily fatigue | [−] | 0 to 10 | 4.78 | 1.83 | 4.53 | 1.88 | .27 |
| Daily additional pain medication | [−] | 0 to 1 | 0.32 | 0.33 | 0.35 | 0.34 | .58 |
The symbols in brackets indicate the directionality of the measure: [+] = higher scores are more favorable, [−] = lower scores are more favorable.
AIMS2 = Arthritis Impact Measurement Scales; IVR = interactive voice response.