Normative Data for Interpreting the LIMB-Q.

Abstract

The LIMB-Q is a validated patient-reported outcome instrument developed for lower extremity trauma patients. It is composed of 16 independently functioning scales. Normative values for the LIMB-Q scales have not been established, limiting data interpretation. A cross-sectional study was conducted using participants recruited through an online research community. Eligible individuals were residents of the United States or Canada, fluent in English, aged 18 ≥ years, and had no prior history of lower extremity injury or infection resulting in fracture, surgery, amputation, or flap reconstruction. Participants provided demographic information and completed the LIMB-Q scales for Lower Limb Physical Function, Lower Limb Symptoms, Psychological, Sexual, and Work. Data analysis, including bivariate analyses, was performed. The LIMB-Q scales were completed by 1,137 individuals. Fifty-three percent identified as female. The median age was 34 years (interquartile range, 27-43), with 6% of participants aged ≥ 60 years. Sixty-five percent were Caucasian, and 77% had worked within the past three months. Mean ± standard deviation LIMB-Q scores were as follows: Lower Limb Function (83 ± 14), Lower Limb Symptoms (86 ± 13), Psychological (85 ± 16), Work (92 ± 16), and Sexual (69 ± 25). Scores for Physical Function and Symptoms scales were higher for individuals < 60 years old compared to those ≥ 60 years (84 vs. 74 and 87 vs. 82, respectively, both p < 0.001). These are the first published normative scores for the LIMB-Q and will provide a clinical reference point for the interpretation of LIMB-Q data.