Table 5.
Agreement between linked and self-reported data
|
Agreement N (%) |
Disagreement N (%) |
% Total agreement | Kappa (95% CI) | Sensitivity (95% CI) | Specificity (95% CI) | PPV (95% CI) | NPV (95% CI) | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Both yes | Both no | SR yes LD no | SR no LD yes | |||||||
|
All crashes |
|
|
|
|
|
|
|
|
|
|
| At least one crash claimed to ACC |
114 (7.8) |
1201 (82.5) |
59 (4.1) |
82 (5.6) |
90.3 |
0.56 (0.50, 0.63) |
65.9 (58.3, 72.8) |
93.6 (92.1, 94.9) |
58.2 (50.9, 65.1) |
95.3 (94.0, 96.4) |
| At least one crash requiring overnight hospital admission |
10 (0.7) |
1415 (97.8) |
18 (1.3) |
12 (0.2) |
98.5 |
0.47 (0.28, 0.66) |
34.5 (18.6, 54.3) |
99.8 (99.3, 100.0) |
76.9 (50.0, 93.8) |
98.7 (97.9, 99.2) |
|
At least one crash requiring attention |
118 (8.1) |
1187 (81.5) |
69 (4.7) |
82 (5.6) |
89.6 |
0.55 (0.49, 0.61) |
63.1 (55.7, 69.9) |
93.5 (92.0, 94.8) |
59.0 (51.8, 65.8) |
94.5 (93.1, 95.7) |
|
Collisions with a motor vehicle |
|
|
|
|
|
|
|
|
|
|
| At least one collision claimed to ACC |
20 (1.4) |
1412 (97.0) |
21 (1.4) |
3 (0.2) |
98.4 |
0.62 (0.48, 0.76) |
48.8 (33.2, 64.6) |
99.8 (99.3, 100.0) |
87.0 (65.3, 96.6) |
98.5 (97.7, 99.1) |
| At least one collision requiring overnight hospital admission |
2 (0.1) |
1443 (99.1) |
8 (0.6) |
3 (0.2) |
99.3 |
0.26 (−0.03, 0.56) |
20.0 (3.5, 55.8) |
99.8 (99.3, 100.0) |
40.0 (7.3, 83.0) |
99.5 (99.0, 99.7) |
| At least one collision reported to police |
10 (0.7) |
1412 (97.0) |
34 (2.3) |
0 (0.0) |
97.7 |
0.36 (0.20, 0.53) |
22.7 (12.0, 38.2) |
100.0 (99.7, 100.0) |
100.0 (65.6, 100.0) |
97.7 (96.7, 98.3) |
| At least one collision requiring attention | 22 (1.5) | 1399 (96.1) | 33 (2.3) | 2 (0.1) | 97.6 | 0.55 (0.41, 0.68) | 40.0 (27.3, 54.1) | 99.9 (99.4, 100.0) | 91.7 (71.5, 98.5) | 97.7 (96.7, 98.4) |
SR, Self-reports; LD, Linked Data.