Bivariate relationships between all variables and the outcome
| Injured N=3101 (34.80) | Not-injured N=5809(65.20) | Prevalence rate ratio (95% CI) | |
|---|---|---|---|
| Community-level variables | |||
| Social capital | |||
| High | 565 (35) | 1214 (65) | Ref. |
| Medium | 1105 (35) | 2050 (65) | 0.99 (0.92 to 1.08) |
| Low | 1340 (35) | 2455 (65) | 0.98 (0.91 to 1.06) |
| SES | |||
| High | 843 (35.2) | 1552 (64.8) | Ref. |
| Medium | 1343 (34.5) | 2550 (65.5) | 0.98 (0.91 to 1.05) |
| Low | 849 (34.6) | 1620 (64.8) | 0.98 (0.91 to 1.08) |
| Street connectivity | |||
| High | 1335 (33.2) | 2679 (66.8) | Ref. |
| Medium | 951 (35.4) | 1738 (64.6) | 1.06 (0.99 to 1.14) |
| Low | 794 (36.8) | 1366 (63.2) | 1.11 (1.03 to 1.19) |
| Individual-level variables | |||
| Gender | |||
| Female | 1485 (32) | 3237 (68) | Ref. |
| Male | 1615 (39) | 2570 (61) | 1.23 (1.16 to 1.30) |
| Age | |||
| Mean (SD) | 14.76 (0.83) | 14.78 (0.81) | t test P=0.33 |
| Individual level of social capital | |||
| High | 986 (33.9) | 1926 (66.1) | Ref. |
| Medium | 892 (32) | 1893 (68) | 0.95 (0.88 to 1.02) |
| Low | 1223 (38.1) | 1990 (61.9) | 1.12 (1.05 to 1.20) |
| Number of risky behaviours | |||
| 0 | 819 (26.1) | 2319 (73.9) | Ref. |
| 1 | 825 (33.2) | 1659 (66.8) | 1.27 (1.17 to 1.38) |
| 2 | 440 (39.4) | 678 (60.6) | 1.51 (1.37 to 1.66) |
| 3 | 534 (43.7) | 687 (56.3) | 1.68 (1.54 to 1.83) |
| 4 | 436 (50.8) | 422 (49.2) | 1.94 (1.78 to 2.12) |
| Family affluence | |||
| Well-off | 1465 (32.1) | 3103 (67.9) | Ref. |
| Average | 1197 (36.3) | 2102 (63.7) | 1.13 (1.06 to 1.20) |
| Worse off | 355 (42.1) | 489 (57.9) | 1.31 (1.20 to 1.43) |
| Number of siblings | |||
| 0 | 553 (36.2) | 975 (63.8) | Ref. |
| 1–2 | 1880 (43.2) | 3619 (65.8) | 0.95 (0.87 to 1.04) |
| ≥3 | 604 (34.4) | 1152 (65.6) | 0.95 (0.88 to 1.02) |
| Family structure | |||
| Living with two parents | 2107 (33.5) | 4186 (66.5) | Ref. |
| Living with one parent | 656 (37.4) | 1100 (62.6) | 1.12 (1.04 to 1.20) |
| Somebody else/foster care | 302 (38.5) | 482 (61.5) | 1.15 (1.05 to 1.27) |
| Number of friends | |||
| ≥5 | 2849 (34.9) | 5312 (65.1) | Ref. |
| 3–4 | 152 (28.6) | 380 (71.4) | 0.82 (0.71 to 0.94) |
| 0–2 | 100 (46.1) | 117 (53.9) | 1.32 (1.14 to 1.53) |
| Negative peer influence | |||
| Mean (SD) | 8.06 (2.97) | 7.25 (3.00) | t test p<0.0001 |
| Positive peer influence | |||
| Mean (SD) | 14.36 (3.29) | 14.75 (3.15) | t test p<0.0001 |
| Self-rated health | |||
| Good-excellent | 2.279 (33.9) | 4434 (66.1) | Ref. |
| Fair-poor | 786 (37.3) | 1319 (62.7) | 1.10 (1.03 to 1.17) |
Numbers inside parentheses represent row percentages.
Prevalence rate ratios were directly estimated from binomial distributions for injury occurrence.