Table 5 Analyses of agreement between pre- and postoperative data originally registered in SwedEar and at validation
From: Validation of the Swedish Quality Register for Ear Surgery – SwedEar
Variable | Total N | Match N (%) | SwedEar yes Val yes N (%) | SwedEar no Val no N (%) | Non Match N (%) | SwedEar yes Val no N (%) | SwedEar no Val yes N (%) | Observed agreement CI (95%) | Cohen’s kappa CI (95%) | Gwet AC1 CI (95%) | PPV CI (95%) | Systematic difference p value* |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Preoperative form | ||||||||||||
Operated right side | 123 | 122 (99.2) | 65 (52.8) | 57 (46.3) | 1 (0.8) | 1 (0,8) | 0 (0) | 0.99 (0.96–1.00) | 0.98 (0.95–1.00) | 0.98 (0.95–1.00) | 1.00 (1.00–1.00) | 0.317 |
Prior ear surgery | 122 | 120 (98.4) | 26 (21.3) | 94 (77.0) | 2 (1.6) | 0 (0) | 2 (1.6) | 0.98 (0.94–1.00) | 0.95 (0.89–1.00) | 0.97 (0.94–1.00) | 1.00 (1.00–1.00) | 0.157 |
Myringo performed | 123 | 123 (100) | 118 (95.9) | 5 (4.1) | 0 (0) | 0 (0) | 0 (0) | 1.00 (0.97–1.00) | 1.00 (1.00–1.00) | 1.00 (1.00–1.00) | 1.00 (1.00–1.00) | - |
Ossiculoplasty performed | 123 | 121 (98.4) | 22 (18.0) | 99 (80.4) | 2 (1.6) | 0 (0) | 2 (1.6) | 0.98 (0.94–1.00) | 0.95 (0.87–1.00) | 0.98 (0.94–1.00) | 1.00 (1.00–1.00) | 0.157 |
Preoperative antibiotics | 122 | 118 (96.7) | 4 (3.3) | 114 (93.4) | 4 (3.3) | 3 (2.5) | 1 (0.8) | 0.97 (0.92–0.99) | 0.65 (0.33–0.97) | 0.96 (0.93–1.00) | 0.57 (0.20–0.94) | 0.317 |
Infection free at surgery | 121 | 120 (99.2) | 115 (95.0) | 5 (4.1) | 1 (0.8) | 1 (0.8) | 0 (0) | 0.99 (0.95–1.00) | 0.90 (0.72–1.00) | 0.99 (0.97–1.00) | 0.99 (0.97–1.00) | 0.317 |
Perioperative antibiotics | 120 | 119 (99.2) | 21 (17.5) | 98 (81.7) | 1 (0.8) | 1 (0.8) | 0 (0) | 0.99 (0.95–1.00) | 0.97 (0.92–1.00) | 0.99 (0.96–1.00) | 0.95 (0.87–1.00) | 0.317 |
Postoperative antibiotics | 120 | 117 (97.5) | 14 (11.7) | 103 (85.8) | 3 (2.5) | 2 (1.7) | 1 (0.8) | 0.98 (0.93–0.99) | 0.89 (0.77–1.00) | 0.97 (0.93–1.00) | 0.88 (0.71–1.00) | 0.564 |
Postoperative form | ||||||||||||
Intact ear drum | 122 | 120 (98.4) | 98 (80.3) | 22 (18.0) | 2 (1.6) | 1 (0.8) | 1 (0.8) | 0.98 (0.94–1.00) | 0.95 (0.87–1.00) | 0.98 (0.94–1.00) | 0.99 (0.97–1.00) | 1.000 |
Infection free ear | 123 | 120 (97.6) | 118 (95.9) | 2 (1.6) | 3 (2.4) | 2 (1.6) | 1 (0.8) | 0.98 (0.93–0.99) | 0.56 (0.11–1.00) | 0.97 (0.94–1.00) | 0.98 (0.96–1.00) | 0.564 |
Dry ear | 122 | 121 (99.2) | 115 (94.3) | 6 (5.0) | 1 (0.8) | 0 (0) | 1 (0.8) | 0.99 (0.96–1.00) | 0.92 (0.76–1.00) | 0.99 (0.97–1.00) | 1.00 (1.00–1.00) | 0.317 |
Ear drum no deep retraction | 123 | 118 (95.9) | 114 (92.7) | 4 (3.3) | 5 (4.1) | 1 (0.8) | 4 (3.3) | 0.96 (0.91–0.99) | 0.60 (0.27–0.92) | 0.95 (0.91–1.00) | 0.99 (0.97–1.00) | 0.180 |
Postoperative infection | 122 | 116 (95.1) | 9 (7.4) | 107 (87.7) | 6 (4.9) | 2 (1.6) | 4 (3.3) | 0.95 (0.90–0.98) | 0.72 (0.51–0.93) | 0.94 (0.89–0.99) | 0.82 (0.59–1.00) | 0.414 |
Planned additional surgery | 112 | 110 (98.2) | 14 (12.5) | 96 (85.7) | 2 (0.2) | 1 (0.9) | 1 (0.9) | 0.98 (0.94–1.00) | 0.92 (0.82–1.00) | 0.98 (0.94–1.00) | 0.93 (0.81–1.00) | 1.000 |