This is a self-completed questionnaire that consists of a visual analogue scale (VAS) for the degree of global knee pain, and 25 items covering the following four categories: 8 items for pain and stiffness, 10 for conditions in daily life, 9 for general activities, and 2 for health conditions.
Information from the debriefing interview, factor analysis and item response theory analysis resulted in the removal of one item QLQ-ELD15→QLQ-ELD14 QLQ-ELD15→QLQ-ELD14 QLQ-ELD15→QLQ-ELD14ructure to five scands (mobility, worevisionofthethers, future worries, maintaining proposedand illnescalerden) and two structureems (jointostifivescales famobilityport).
The revised QLQ-ELD14 comprises five scales (mobility, worries about others, future worries, maintaining purpose and burden of illness) and two single items (joint stiffness and family support).
Questionnaires with one blank item in the pain and stiffness dimensions and between one and three blank items in the functional capacity dimension were corrected according to the procedure proposed by Bellamy et al, with missing data for the unanswered items being replaced by the mean value of items answered for each dimension [ 27].
In this study, the pain and stiffness items were asked about hips and knees separately.
The I measure consists of pain and stiffness items and the inclusion of sleep, fatigue or emotional functions may have given different results.
The degree of difficulty in performing a variety of daily physical activities because of arm, shoulder or hand problems is determined (21 items), as well as the severity of pain, activity-related pain, tingling, weakness and stiffness (5 items), and the effect of the upper-limb problems on social activities, work, sleep and self-image (4 items).
The items ask about the degree of difficulty in performing different physical activities because of the arm, shoulder, or hand problem (21 items), the severity of each of the symptoms of pain, activity-related pain, tingling, weakness and stiffness (5 items), as well as the problem's impact on social activities, work, sleep, and self-image (4 items).
The main part of the questionnaire, the DASH disability/symptoms score, contains 30 items: 21 items about the ability to perform certain physical activities, 5 items about the severity of pain, activity-related pain, tingling, weakness and stiffness and 4 items concerning the effect of the upper extremity problem on social activities, work, sleep and self-image.
