Table 6 Agreement between linked and self-reported data by participant characteristics
From: Completeness and accuracy of crash outcome data in a cohort of cyclists: a validation study
Participants' characteristics | N | Agreement N (%) | Disagreement N (%) | % Total agreement | Kappa (95% CI) | ||
|---|---|---|---|---|---|---|---|
Both yes | Both no | SR yes LD no | SR no LD yes | ||||
Age | Â | Â | Â | Â | Â | Â | Â |
16-35 | 158 | 16 (10.1) | 125 (79.1) | 5 (3.2) | 12 (7.6) | 89.2 | 0.59 (0.42, 0.77) |
36-50 | 715 | 64 (9.0) | 590 (82.5) | 26 (3.6) | 35 (4.9) | 91.5 | 0.63 (0.54, 0.71) |
51+ | 583 | 38 (6.5) | 472 (81.0) | 38 (6.5) | 35 (6.0) | 87.5 | 0.44 (0.33, 0.55) |
Gender | Â | Â | Â | Â | Â | Â | Â |
Male | 1069 | 93 (8.7) | 865 (80.9) | 49 (4.6) | 62 (5.8) | 89.6 | 0.57 (0.49, 0.64) |
Female | 387 | 25 (6.5) | 322 (83.2) | 20 (5.2) | 20 (5.2) | 89.7 | 0.50 (0.36, 0.63) |
Ethnicity | Â | Â | Â | Â | Â | Â | Â |
Maori | 46 | 3 (6.5) | 40 (87.0) | 1 (2.2) | 2 (4.4) | 93.5 | 0.63 (0.25, 1.00) |
Non-Maori | 1410 | 115 (8.2) | 1147 (81.4) | 68 (4.8) | 80 (5.7) | 89.5 | 0.55 (0.48, 0.61) |
Level of education | Â | Â | Â | Â | Â | Â | Â |
High school (secondary) or less | 240 | 13 (5.4) | 193 (80.4) | 15 (6.3) | 19 (7.9) | 85.8 | 0.35 (0.18, 0.52) |
Polytechnic | 370 | 31 (8.4) | 305 (82.4) | 14 (3.8) | 20 (5.4) | 90.8 | 0.59 (0.47, 0.72) |
University | 846 | 74 (8.8) | 689 (81.4) | 40 (4.7) | 43 (5.1) | 90.2 | 0.58 (0.50, 0.66) |
NZDep 2006 scores* | Â | Â | Â | Â | Â | Â | Â |
1-3 | 752 | 61 (8.1) | 600 (79.8) | 43 (5.7) | 48 (6.4) | 87.9 | 0.50 (0.41, 0.59) |
4-7 | 516 | 44 (8.5) | 426 (82.6) | 19 (3.7) | 27 (5.2) | 91.1 | 0.61 (0.50, 0.71) |
8-10 | 174 | 13 (7.5) | 149 (85.6) | 6 (3.5) | 6 (3.5) | 93.1 | 0.65 (0.46, 0.83) |
Urbanity of residence | Â | Â | Â | Â | Â | Â | Â |
Main urban area | 1165 | 98 (8.4) | 943 (80.9) | 58 (5.0) | 66 (5.7) | 89.4 | 0.55 (0.48, 0.62) |
Others | 277 | 20 (7.2) | 232 (83.8) | 10 (3.6) | 15 (5.4) | 91.0 | 0.56 (0.41, 0.72) |
Region of residence | Â | Â | Â | Â | Â | Â | Â |
Auckland | 531 | 37 (7.0) | 431 (81.2) | 30 (5.7) | 33 (6.2) | 88.1 | 0.47 (0.36, 0.58) |
Wellington | 313 | 27 (8.6) | 251 (80.2) | 14 (4.5) | 21 (6.7) | 88.8 | 0.54 (0.41, 0.68) |
Others | 598 | 54 (9.0) | 493 (82.4) | 24 (4.0) | 27 (4.5) | 91.5 | 0.63 (0.54, 0.72) |
Pre-existing medical condition Æš | Â | Â | Â | Â | Â | Â | Â |
Yes | 296 | 23 (7.8) | 237 (80.1) | 21 (7.1) | 15 (5.1) | 87.8 | 0.49 (0.35, 0.63) |
No | 1160 | 95 (8.2) | 950 (81.9) | 48 (4.1) | 67 (5.8) | 90.1 | 0.57 (0.50, 0.64) |
Hours spent cycling a week | Â | Â | Â | Â | Â | Â | Â |
0-2 | 237 | 12 (5.0) | 212 (89.5) | 3 (1.3) | 10 (4.2) | 94.5 | 0.62 (0.43, 0.81) |
3-5 | 552 | 47 (8.5) | 444 (80.4) | 31 (5.6) | 30 (5.4) | 88.9 | 0.54 (0.44, 0.64) |
6+ | 667 | 59 (8.8) | 531 (79.6) | 35 (5.2) | 42 (6.3) | 88.5 | 0.54 (0.45, 0.63) |
Confidence of reporting having crashes | Â | Â | Â | Â | Â | Â | Â |
Sure or very sure | 1413 | 117 (8.3) | 1150 (81.4) | 68 (4.8) | 78 (5.5) | 89.7 | 0.56 (0.49, 0.62) |
Others | 43 | 1 (2.3) | 37 (86.1) | 1 (2.3) | 4 (9.3) | 88.4 | 0.23 (−0.20, 0.68) |