Table 6.
Agreement between linked and self-reported data by participant characteristics
| 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 |
|
|
|
|
|
|
|
| 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 |
|
|
|
|
|
|
|
| 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 |
|
|
|
|
|
|
|
| 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 |
|
|
|
|
|
|
|
| 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* |
|
|
|
|
|
|
|
| 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 |
|
|
|||||
| 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 |
|
|
|
|
|
|
|
| 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 conditionƚ |
|
|
|
|
|
|
|
| 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 |
|
|
|
|
|
|
|
| 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 |
|
|
|
|
|
|
|
| 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) |
* 2006 New Zealand Deprivation Index with decile ten the most deprived neighbourhood and decile one the least.
ƚ Heart attack, stroke, cancer, diabetes or high blood pressure.
SR, Self-reports; LD, Linked Data.