Cross-cultural translation and validation of the Greek version of the Knee Injury and Osteoarthritis Outcome Score (KOOS) in patients with total knee replacement.

Purpose: Aim of this study is to assess the psychometric properties of the developed Greek version of the Knee Injury and Osteoarthritis Outcome Score (KOOS) in total knee replacement (TKR) patients.

Methods: Psychometric properties of the Greek version of KOOS were evaluated according to the Consensus-based Standards Measurements Instruments (COSMIN) checklist. Patients' pre-operative clinical status and post-operative outcomes at two occasions (at discharge and 10-12 days post-operatively) were evaluated using the KOOS, KOS-ADL and SF-12 Health Survey.

Sub-grouping patients with non-specific low back pain based on cluster analysis of discriminatory clinical items.

Objective: To identify potential subgroups amongst patients with non-specific low back pain based on a consensus list of potentially discriminatory examination items.

Design: Exploratory study.

Participants: A convenience sample of 106 patients with non-specific low back pain (43 males, 63 females, mean age 36 years, standard deviation 15.

Which are the most important discriminatory items for subclassifying non-specific low back pain? A Delphi study among Greek health professionals.

Rationale, Aims And Objectives: Developing homogenous low back pain (LBP) classification groups is recommended for enhancing clinical outcomes. However, an important step towards the development of specific subgroups is the selection and consensus agreement among health professionals on the discriminatory clinical items (sings and symptoms) that should be included in the classification process. Thus, this study's objective was to develop a list of clinical features for the assessment of LBP by health care providers within Greece, which are believed to be discriminatory in identifying LBP subgroups.