From: Physical fighting, fighting-related injuries and family affluence among Canadian youth
 | Bivariate model | Multivariate modela,b | ||||||
---|---|---|---|---|---|---|---|---|
 | Male | Female | Male | Female | ||||
 | RR (95 % CI) | p-value | RR (95 % CI) | p-value | RR (95 % CI) | p-value | RR (95 % CI) | p-value |
Self-perceived affluence | Â | Â | Â | Â | Â | Â | Â | Â |
Low | 1.14 (1.05–1.25) | 0.003 | 1.66 (1.45–1.90) | <0.001 | 0.99 (0.91–1.09) | 0.886 | 1.39 (1.20–1.60) | <0.001 |
Moderate | 1.08 (1.02–1.15) | 0.005 | 1.39 (1.27–1.53) | <0.001 | 1.02 (0.95–1.09) | 0.575 | 1.30 (1.17–1.43) | <0.001 |
High | 1.00 (Ref) | Â | 1.00 (Ref) | Â | 1.00 (Ref) | Â | 1.00 (Ref) | Â |
Family affluence scale | Â | Â | Â | Â | Â | Â | Â | Â |
Low | 1.09 (0.92–1.28) | 0.317 | 1.50 (1.23–1.85) | <0.001 | 1.01 (0.86–1.19) | 0.888 | 1.42 (1.14–1.79) | 0.002 |
Moderate | 0.93 (0.89–0.98) | 0.008 | 1.12 (1.02–1.23) | 0.016 | 0.93 (0.88–0.98) | 0.010 | 1.06 (0.97–1.17) | 0.213 |
High | 1.00 (Ref) | Â | 1.00 (Ref) | Â | 1.00 (Ref) | Â | 1.00 (Ref) | Â |
Average household income | Â | Â | Â | Â | Â | Â | Â | Â |
Low | 1.07 (0.96–1.18) | 0.220 | 1.32 (1.15–1.53) | <0.001 | 1.03 (0.93–1.14) | 0.536 | 1.26 (1.08–1.46) | 0.003 |
Moderate | 1.08 (0.99–1.17) | 0.086 | 1.17 (1.01–1.36) | 0.031 | 1.07 (0.98–1.16) | 0.130 | 1.15 (0.99–1.34) | 0.075 |
High | 1.00 (Ref) | Â | 1.00 (Ref) | Â | 1.00 (Ref) | Â | 1.00 (Ref) | Â |
Sub-cohort analysisc | Bivariate model | Multivariate modelb,d | ||||||
 | RR (95 % CI) | p-value | RR (95 % CI) | p-value | RR (95 % CI) | p-value | RR (95 % CI) | p-value |
Self-perceived affluence | Â | Â | Â | Â | Â | Â | Â | Â |
Low | 1.13 (0.98–1.30) | 0.086 | 1.63 (1.31–2.01) | <0.001 | 0.95 (0.80–1.12) | 0.550 | 1.37 (1.09–1.72) | 0.008 |
Moderate | 1.12 (1.02–1.24) | 0.023 | 1.29 (1.11–1.51) | 0.001 | 1.03 (0.93–1.13) | 0.582 | 1.17 (0.99–1.39) | 0.073 |
High | 1.00 (Ref) | Â | 1.00 (Ref) | Â | 1.00 (Ref) | Â | 1.00 (Ref) | Â |
Family affluence scale | Â | Â | Â | Â | Â | Â | Â | Â |
Low | 1.11 (0.82–1.49) | 0.501 | 1.32 (0.87–2.02) | 0.194 | 0.94 (0.71–1.26) | 0.695 | 1.44 (0.99–2.07) | 0.052 |
Moderate | 0.89 (0.81–0.98) | 0.016 | 1.20 (1.02–1.40) | 0.027 | 0.87 (0.79–0.97) | 0.011 | 1.07 (0.89–1.27) | 0.478 |
High | 1.00 (Ref) | Â | 1.00 (Ref) | Â | 1.00 (Ref) | Â | 1.00 (Ref) | Â |
Average household income | Â | Â | Â | Â | Â | Â | Â | Â |
Low | 0.98 (0.84–1.15) | 0.809 | 1.04 (0.82–1.30) | 0.768 | 1.01 (0.85–1.19) | 0.944 | 1.01 (0.81–1.25) | 0.965 |
Moderate | 0.99 (0.86–1.14) | 0.917 | 1.03 (0.83–1.27) | 0.797 | 1.04 (0.89–1.22) | 0.581 | 0.97 (0.77–1.21) | 0.775 |
High | 1.00 (Ref) | Â | 1.00 (Ref) | Â | 1.00 (Ref) | Â | 1.00 (Ref) | Â |