Table 3.

Spearman Rank Order Correlations Between PROMIS and Legacy Instruments

NRS-PI Numerical Rating Scale for Pain Intensity, SF-36: BP Medical Outcomes Study Short-Form 36: Bodily Pain Domain, BPI Brief Pain Inventory, PCS Pain Catastrophizing Scale, FABQ Fear Avoidance Beliefs Questionnaire, RMDQ Roland Morris Disability Questionnaire, PHQ-4-D Patient Health Questionnaire 4 Depression Subscale, PHQ4-A Patient Health Questionnaire 4 Anxiety Subscale, FACIT Functional Assessment of Chronic Illness Therapy – Fatigue, MOS Sleep Medical Outcomes Study – Sleep Scale, MOS SSS Medical Outcomes Study Social Support Survey; rho Spearman rank order correlation coefficient; n Number of pairs

Highlighted measures provide convergent validity. Strength of correlation: weak (r = 0.20–0.39); moderate (r = 0.40–0.59); strong (r = 0.60–0.79); very strong (r = 0.80–1.0) [35]

* = p < 0.05, ** = p < 0.01, † = Inverted scores