Table 3.

Mean (95% CI) scores, treatment effects (between group change at 9 and 21 months), and p values estimated using t tests on the differences between the Internal Family System (IFS) and education groups.

OutcomesIFS Group, n = 38Control Group, n = 40Treatment EffectEffect Sizep
Disease activity variables
  DAS-CRP4 Score*
    Baseline3.8 (3.4, 4.3)3.0 (2.6, 3.4)
    Month 92.7 (2.1, 3.3)3.1 (2.6, 3.6)−1.6 (−2.5, −0.6)1.10.10
    Month 213.0 (2.4, 3.7)3.0 (2.4, 3.5)−1.1 (−1.9, −0.3)0.80.17
  RADAI Joint Score
    Baseline1.9 (1.4, 2.4)1.5 (1.1, 1.9)
    Month 91.5 (1.1, 1.9)2.1 (1.4, 2.7)−0.9 (−1.6, −0.2)0.60.01
    Month 211.4 (1.0, 1.8)1.6 (1.1, 2.1)−0.6 (−1.1, 0.0)0.50.04
Psychological variables
  Beck Depression Scale
    Baseline10.2 (8.0, 12.5)9.2 (6.9, 11.6)
    Month 95.6 (3.7, 7.5)8.1 (5.4, 10.9)−2.9 (−6.1, 0.2)0.40.07
    Month 216.9 (4.8, 9.0)9.5 (6.7, 12.4)−3.2 (−5.6, −0.8)0.60.01
  State Trait Anxiety Index
    Baseline38.4 (35.5, 41.2)36.5 (33.1, 40.0)
    Month 935.2 (32.1, 38.2)36.8 (32.6, 40.9)−2.2 (−7.2, 2.8)0.20.39
    Month 2136.5 (33.4, 39.6)35.4 (31.3, 39.4)−0.3 (−5.0, 4.4)00.90
  Self-compassion Scale
    Baseline20.9 (19.5, 22.2)22.5 (21.0, 23.9)
    Month 922.7 (21.3, 24.0)22.7 (21.2, 24.1)1.6 (0.2, 3.0)0.50.03
    Month 2123.3 (22.2, 24.5)22.3 (20.8, 23.8)1.8 (0.5, 3.1)0.70.01
  Self-efficacy*
    Baseline68.2 (63.1, 73.4)77.1 (71.8, 82.3)
    Month 976.3 (71.3, 81.2)73.5 (67.5, 79.5)10.5 (2.6, 18.5)0.70.07
    Month 2172.6 (66.8, 78.3)74.7 (67.8, 81.6)7.1 (−0.3, 14.5)0.50.27
Functional variables
  SF-12 Physical Function Score
    Baseline51.9 (41.5, 62.4)64.1 (53.6, 74.6)
    Month 957.9 (46.3, 69.4)52.9 (40.6, 65.2)14.6 (2.4, 26.8)0.60.02
    Month 2154.4 (42.2, 66.6)56.6 (44.0, 69.2)7.4 (−3.9, 18.6)0.30.20
  Visual Analog Pain Scale
    Baseline43.2 (34.1, 52.2)31.7 (23.0, 40.4)
    Month 930.1 (21.4, 38.9)34.5 (25.6, 43.5)−14.9 (−29.1, −0.7)0.50.04
    Month 2135.9 (26.0, 45.8)29.7 (20.1, 39.3)−9.8 (−23.5, 3.8)0.40.15
  Sleep
    Baseline1.0 (0.7, 1.3)0.8 (0.5, 1.1)
    Month 90.8 (0.5, 1.0)0.9 (0.6, 1.3)−0.3 (−0.6, 0.1)0.40.11
    Month 210.9 (0.6, 1.1)0.9 (0.6, 1.3)−0.2 (−0.5, 0.1)0.40.13
  • * Adjusting for baseline differences in outcome score using general linear regression. Measure difference = intercept + group + baseline measure. DAS-CRP4: Disease Activity Score 28-C-reactive Protein 4; RADAI: Rheumatoid Arthritis Disease Activity Index; SF-12: Short form-12.