Table 3.
Concordance in Reporting the Occurrence and Timing of Important Disease-Related Events from Patient Responses and Medical Chart Data, Shanghai, China, 2002-2006.
| Name of event a | % reported in PQb | % reported in MCc | Number of shared observations d | Agreement (%) | Kappa | Sensitivity % (95% CI) | Specificity % (95% CI) |
|---|---|---|---|---|---|---|---|
| Date of diagnosis of breast cancer | 100.0 | 99.4 | 4,916 | 93.5 | 0.930 | - | - |
| Date of surgery | 100.0 | 99.4 | 4,916 | 86.4 | 0.840 | - | - |
| Did you receive chemotherapy? (Yes/No) | 100.0 (91.4% Yes) | 100.0 (84.1% Yes) | 4,948 | 90.1 | 0.550 | 98.3 (97.9-98.7) | 45.2 (41.7-48.7) |
| Date started chemotherapy | 91.2 | 83.6 | 4,068 | 79.0 | 0.790 | - | - |
| Did you receive radiation therapy? (Yes/No) | 100.0 (32.1% Yes) | 100.0 (4.9% Yes) | 4,948 | 71.7 | 0.170 | 88.9 (84.3-92.6) | 70.9 (69.6-72.2) |
| Date radiation therapy started | 32.1 | 4.93 | 217 | 79.3 | 0.790 | - | - |
a For the purposes of comparison, all dates were either reported or recoded in YYYYMM format in both instruments.
b PQ: Patient questionnaire.
c MC: Medical chart.
d Number of patients across both surveys that had data for a specific question.