Hip-specific and generic patient-reported outcome measure scores after primary hip replacement are associated with early revision surgery: a national registry study

Journal of Patient-Reported Outcomes

Table 3 Associations between post-operative scores and revision hip replacement

Post-operative score	Unadjusted relative risk* (95%CI)	Relative risk adjusted for age and gender** (95%CI)
Hip pain VAS	1.30 (1.23 to 1.38)	1.31 (1.23 to 1.39)
Oxford Hip Score	0.90 (0.89 to 0.92)	0.90 (0.89 to 0.92)
HOOS-12 Pain	0.95 (0.94 to 0.96)	0.95 (0.94 to 0.96)
HOOS-12 Function	0.96 (0.95 to 0.96)	0.96 (0.95 to 0.96)
HOOS-12 Quality of life	0.95 (0.94 to 0.97)	0.95 (0.94 to 0.97)
HOOS-12 Summary	0.95 (0.94 to 0.96)	0.95 (0.94 to 0.96)
EQ-5D-5L utility score	0.12 (0.07 to 0.18)	0.11 (0.07 to 0.18)
EQ VAS	0.98 (0.97 to 0.98)	0.98 (0.97 to 0.98)

*Relative risk of revision hip replacement for a 1-unit increase in PROMs score
**Relative risk of revision hip replacement for a 1-unit increase in PROMs score after adjusting for age and gender
CI: confidence interval; EQ-5D-5L: Euroqol 5-dimension quality of life index; EQ VAS: Euroqol Health Today Visual Analogue Scale; HOOS-12: 12-item Hip disability and Osteoarthritis Outcome Score; VAS: visual analogue scale
Relative risk > 1 indicates a significant increase in likelihood of revision hip replacement; relative risk < 1 indicates significant decrease in likelihood of revision hip replacement
Higher score indicates greater pain (for hip pain VAS), better hip-related outcomes (Oxford Hip Score and HOOS-12 scores), higher quality of life (for EQ-5D-5L utility score) and better health (for EQ VAS)