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Table 3 Appraisal of clarity between legacy (original) and rewritten HAQ-DI 1 and PF-10 2 and "performance" and "capability" items

From: Better assessment of physical function: item improvement is neglected but essential

Item group (number completing) % Unclear (SEc)
HAQ-DI, Legacy (20) 5.8 (0.56)
HAQ-DI, Rewritten (20) 5.4 (0.68)
PF-10, Legacy (10) 12.5 (1.6)
PF-10, Rewritten initial (10) 10.8 (1.1)
PF-10, Rewritten final (2) 4.5 (1.8)
Capability ("Are you able...?") (219) 8.9 (0.43)
Performance ("Did you...?") (48) 15.5 (1.2)
  1. aHealth Assessment Questionnaire Disability Index.
  2. b10-item physical function scale of the SF-36.
  3. cStandard error of proportion.