PROMIS is a Valid Patient-Reported Outcome Measure for Patients undergoing ACL Reconstruction with Multi-ligament Knee Reconstruction and Repair Procedures.

BACKGROUND

This study aimed to (1) compare PROMIS with previously validated legacy instruments and (2) to assess between group differences of PROMIS PF-CAT [Physical Function Computer Adaptive Test] for patients undergoing isolated primary ACL reconstruction [ACLR] vs. primary ACL reconstruction with additional ligamentous intervention [MLIK].

LEVEL OF EVIDENCE

II; Prospective Cohort Study.

METHODS

At a single preoperative timepoint, 42 [MLIK] and 73[ACLR] patients completed: Short Form 36 Health Survey (SF-36) Mental (MCS) and Physical Component Summary (PCS), Knee Injury and Osteoarthritis Outcome Score (KOOS), Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), EuroQol-5 dimensions (EQ-5D) and Marx Knee Scale. Spearman correlation coefficients (non-parametric data) assessed correlations between PROMIS PF-CAT and legacy PROs [Patient-Reported Outcome instruments]. Floor and ceiling effects were assessed using chi-square tests. Between group differences were assessed (Wilcoxon Rank sum test).

RESULTS

PROMIS PF-CAT for the MLIK cohort [Table 2] demonstrated an excellent-good correlation with SF-36 Physical Function (PCS; r = 0.64, p < 0.01), EQ-5D (r = 0.68, p < 0.01), and KOOS Quality of Life (QOL) (r = 0.68, p < 0.01); good correlation with KOOS ADL (r = 0.52, p = 0.01), KOOS Sports (r = 0.44, p < 0.01), KOOS Pain (r = 0.44, p < 0.01) and WOMAC Function (r = 0.52,p = 0.01). PROMIS PF-CAT scores differed for ACL vs. MLIK cohorts (41.9 ± 6.6 vs. 37.6 ± 9.0, p < 0.01). PROMIS PF-CAT demonstrated the fewest floor and ceiling effects [Table 4] versus legacy PRO instruments.

CONCLUSION

PROMIS PF-CAT demonstrated strong correlations with previously validated PRO instruments and offers a favorable alternative for patients undergoing ACLR with MLIK repair/reconstruction procedures. Preoperative PROMIS PF-CAT scores were greater for patients undergoing primary ACLR versus MLIK intervention.