  Patient-reported outcomes (PROs) evaluate how patients describe symptoms as well as level of physical function or quality of life. The Western Ontario and McMaster Universities Osteoarthritis (WOMAC) Index is one of the most common PROs used to assess disability in patients with knee osteoarthritis (OA), yet the Single Assessment Numeric Evaluation (SANE) is a single-question instrument that may improve the efficiency associated with the measurement of patient function.
  To determine the associations between (1) SANE
  Cross-sectional study.
  Research laboratory.
  Thirty-six participants (15 men, 21 women) with radiographic knee OA.
  Participants completed 12 sessions (over a 4-week period) of therapeutic exercise to strengthen the lower extremity.
  The SANE
  Participants with a higher SANE
  The SANE