title: Demonstration of the test-retest reliability and sensitivity of the Lower Limb Functional Index-10 as a measure of functional recovery post burn injury: a cross-sectional repeated measures study design.
abstract: BACKGROUND
  Lower limb burns can significantly delay recovery of function. Measuring lower limb functional outcomes is challenging in the unique burn patient population and necessitates the use of reliable and valid tools. The aims of this study were to examine the test-retest reliability, sensitivity, and internal consistency of Sections 1 and 3 of the Lower Limb Functional Index-10 (LLFI-10) questionnaire for measuring functional ability in patients with lower limb burns over time.
  
  
  METHODS
  Twenty-nine adult patients who had sustained a lower limb burn injury in the previous 12 months completed the test-retest procedure of the study. In addition, the minimal detectable change (MDC) was calculated for Section 1 and 3 of the LLFI-10. Section 1 is focused on the activity limitations experienced by patients with a lower limb disorder whereas Section 3 involves patients indicating their current percentage of pre-injury duties.
  
  
  RESULTS
  Section 1 of the LLFI-10 demonstrated excellent test-retest reliability (intra-class correlation coefficient (ICC) 0.98, 95 % CI 0.96-0.99) whilst Section 3 demonstrated high test-retest reliability (ICC 0.88, 95 % CI 0.79-0.94). MDC scores for Sections 1 and 3 were 1.27 points and 30.22 %, respectively. Internal consistency was demonstrated with a significant negative association (r s  = -0.83) between Sections 1 and 3 of the LLFI-10 (p < 0.001).
  
  
  CONCLUSIONS
  This study demonstrates that Section 1 and 3 of the LLFI-10 are reliable for measuring functional ability in patients who have sustained lower limb burns in the previous 12 months, and furthermore, Section 1 is sensitive to changes in patient function over time.
authors: School of Physiotherapy and Exercise Science, Curtin University, Bentley, 6102 WA Australia.
authors: Margaret E
authors: ME
authors: Ryland
authors: School of Physiotherapy and Exercise Science, Curtin University, Bentley, 6102 WA Australia ; Fiona Wood Foundation of Western Australia, Fiona Stanley Hospital, 11 Warren Drive, Murdoch, 6150 WA Australia.
authors: Tiffany L
authors: TL
authors: Grisbrook
authors: Fiona Wood Foundation of Western Australia, Fiona Stanley Hospital, 11 Warren Drive, Murdoch, 6150 WA Australia ; State Adult Burn Unit, Fiona Stanley Hospital, Level 4, 11 Warren Smith Drive, Murdoch, 6150 WA Australia ; Burn Injury Research Unit, The University of Western Australia, Crawley, 6009 WA Australia.
authors: Fiona M
authors: FM
authors: Wood
authors: Harry Perkins Institute of Medical Research, The University of Western Australia, Crawley, 6009 WA Australia.
authors: Michael
authors: M
authors: Phillips
authors: Fiona Wood Foundation of Western Australia, Fiona Stanley Hospital, 11 Warren Drive, Murdoch, 6150 WA Australia ; State Adult Burn Unit, Fiona Stanley Hospital, Level 4, 11 Warren Smith Drive, Murdoch, 6150 WA Australia ; Burn Injury Research Unit, The University of Western Australia, Crawley, 6009 WA Australia ; Burn Injury Research Node, The University of Notre Dame Australia, 19 Mouat St, Fremantle, 6160 WA Australia.
authors: Dale W
authors: DW
authors: Edgar
keywords: Burn; Internal consistency; Lower limb function; Minimal detectable change; Outcome measure; Questionnaire