Table 4.
Agreement between Survey and Manual Chart Review (N = 750)
| Complication | Frequency
|
Agreement
|
|||||
|---|---|---|---|---|---|---|---|
| Survey Negative; Chart Review Negative | Survey Negative; Chart Review Positive | Survey Positive; Chart Review Negative | Survey Positive; Chart Review Positive | Positive Agreement (%) | Negative Agreement (%) | Kappa (95% CI) | |
| Myocardial infarction | 743 | 0 | 7 | 0 | 0 | > 99 | — |
| Cardiac arrest | 745 | 0 | 5 | 0 | 0 | > 99 | — |
| Congestive heart failure | 726 | 1 | 22 | 1 | 8 | 98 | 0.08 (−0.07 to 0.22) |
| Arrhythmia | 651 | 13 | 56 | 30 | 47 | 95 | 0.42 (0.31 to 0.53) |
| Angina | 740 | 2 | 7 | 1 | 18 | 99 | 0.18 (−0.13 to 0.48) |
| Stroke | 739 | 0 | 7 | 4 | 53 | > 99 | 0.53 (0.22 to 0.84) |
| Deep venous thrombosis | 728 | 2 | 15 | 5 | 37 | 99 | 0.36 (0.13 to 0.59) |
| Pulmonary embolism | 742 | 0 | 5 | 3 | 55 | > 99 | 0.54 (0.19 to 0.90) |
| Wound infection | 706 | 8 | 35 | 1 | 4 | 97 | 0.02 (−0.06 to 0.11) |
| Respiratory arrest | 743 | 0 | 7 | 0 | 0 | 100 | — |
| Respiratory failure | 728 | 0 | 20 | 2 | 17 | 99 | 0.16 (−0.04 to 0.36) |
| Pneumonia | 729 | 0 | 17 | 4 | 32 | 99 | 0.31 (0.08 to 0.55) |
| Kidney failure requiring dialysis | 734 | 0 | 14 | 2 | 22 | 99 | 0.22 (−0.03 to 0.47) |
| Nerve injury | 706 | 6 | 32 | 6 | 24 | 97 | 0.22 (0.06 to 0.38) |
| Gastrointestinal bleed | 739 | 1 | 9 | 1 | 17 | 99 | 0.16 (−0.12 to 0.45) |
| Peptic ulcer | 742 | 1 | 7 | 0 | 0 | 99 | 0.00 (−0.01 to 0.00) |
| Severe pain > 1 day | 464 | 98 | 110 | 78 | 43 | 82 | 0.25 (0.17 to 0.32) |
| Severe nausea/vomiting > 1 day | 550 | 137 | 28 | 35 | 30 | 87 | 0.20 (0.12 to 0.28) |
Note that these 750 patients are a subset of the 1,578 patients shown in table 3. Kappa is undefined if either the survey or the chart review identifies zero cases of a particular complication.