Intra-observer variability in classifying the cases
| Observed variability of each sound category | ||||
|---|---|---|---|---|
| Observers | Kappa | No murmur | Innocent murmur | Pathological murmur |
| 95% confidence intervals in parentheses. | ||||
| A | 0.97 (0.97 to 1.00) | 1.00 (1.00 to 1.00) | 0.97 (0.91 to 1.00) | 0.97 (0.89 to 1.00) |
| B | 0.89 (0.79 to 0.99) | 0.88 (0.74 to 1.00) | 0.89 (0.76 to 1.00) | 1.00 (1.00 to 1.00) |
| C | 0.87 (0.76 to 0.98) | 0.95 (0.85 to 1.00) | 0.88 (0.74 to 1.00) | 0.92 (0.80 to 1.00) |
| D | 0.73 (0.59 to 0.88) | 0.86 (0.72 to 1.00) | 0.74 (0.56 to 0.91) | 0.88 (0.72 to 1.00) |
| All | 0.87 (0.82 to 0.92) | 0.93 (0.87 to 0.98) | 0.87 (0.80 to 0.94) | 0.94 (0.89 to 1.00) |