Table 4

Correlations between PROBE and EQ-5D-5L items (convergent validity)

EQ-5D-5LPROBECorrelation95% CI
MobilityQ.9 Mobility aids0.420.35 to 0.47
Pain and discomfortQ.10 Pain medications0.550.50 to 0.60
Q.11.1 Acute pain (activities)0.420.36 to 0.48
Q.11.2 Acute pain (interference)0.390.32 to 0.45
Q.12.1 Chronic pain (activities)0.560.51 to 0.61
Q.12.2 Chronic pain (interference)0.570.52 to 0.62
Self-careQ.13 Activities of daily living0.650.61 to 0.69
Usual activitiesQ.13 Activities of daily living0.710.67 to 0.74
AnxietyN/AN/AN/A
Utility index scoreTotal score0.670.62 to 0.71
  • EQ-5D-5L, EuroQol five dimension 5-level instrument;  EQ-VAS, EuroQol visual analogue scale; N/A, not applicable; PROBE, Patient Reported Outcomes, Burdens and Experiences.