PRO algorithm | n | Perfect agreement % (95% CI) | Disagreement improved status % (95% CI) | Disagreement worsening status % (95% CI) | Kappa* (95% CI) |
Pooled | 554 | 82 (78 to 85) | 7 (5 to 9) | 11 (9 to 14) | 0.67 (0.60 to 0.74) |
Web–web | 166 | 87 (80 to 92) | 5 (2 to 9) | 8 (5 to 14) | 0.78 (0.67 to 0.86) |
Paper–paper | 112 | 82 (74 to 89) | 8 (4 to 15) | 10 (5 to 17) | 0.69 (0.57 to 0.81) |
Mixed† | 276 | 79 (74 to 84) | 8 (5 to 12) | 13 (9 to 18) | 0.59 (0.48 to 0.69) |
*Weighted Kappa with squared weights.
†Web–paper and paper–web.
PRO, patient-reported outcome.