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. Author manuscript; available in PMC: 2024 Feb 1.
Published in final edited form as: Semin Arthritis Rheum. 2022 Nov 3;58:152111. doi: 10.1016/j.semarthrit.2022.152111

Table 3.

Correlations between the PROMIS physical function, pain interference, and fatigue, forms, and other variables and instruments according to the a priori hypotheses generated by the Working Group.

Variables n A priori hypothesis- expected correlation % Agreement of Members Pearson’s r Hypothesis confirmed
PROMIS Physical Function
 PROMIS Depression (4a v1) 263 Moderate 93% −0.49 Yes
 Sex 78 Low 100% T test*, p=0.6 Yes
 Age 78 Low 100% −0.11 Yes
 International Physical Activity Questionnaire 100 Moderate 86% −0.13 No
 Myositis Activities Profile 100 Moderate 86% 0.77 No
PROMIS Pain Interference
 PROMIS Sleep Disturbance (4a v1) 263 Moderate 93% 0.35 Yes
 Pain Intensity Numeric Scale 263 Moderate 100% 0.87 Yes
 Sex N/A Low 57% Dropped N/A
 Age 65 Low 93% −0.18 Yes
 Pain Disability Index 100 High 100% 0.63 No
PROMIS Fatigue
 PROMIS Anxiety (4a v1.0) 263 Moderate 93% 0.58 Yes
 PROMIS Sleep Disturbance (4a v1) 263 Moderate 100% 0.54 Yes
 Sex 68 Low 100% T test*, p=0.6 Yes
 Age 68 Low 100% −0.18 Yes
*

t-test was used for categorical variables and Pearson or Spearman correlation was used for continuous variables as appropriate.