Social variables | Odds ratios for having each safety practice (95% CI) | |||||
Safe hot tap water temperature | Keeping hot drinks/food out of child’s reach | Possession of functioning smoke alarm | Possession of fitted fireguard | Possession of fire extinguisher | Safe storage of matches | |
Gender | ||||||
Boys | 1.14 (0.82 to 1.56) | 0.81 (0.51 to 1.27) | 2.28 (0.29 to 40.67) | 0.89 (0.69 to 1.14) | 1.15 (0.50 to 2.66) | † |
Girls | 1.47 (1.00 to 2.22) | 0.92 (0.61 to 1.43) | 2.34 (0.30 to 42.18) | 1.46 (1.14 to 1.90) | 0.67 (0.20 to 2.19) | † |
Interaction term* | 0.77 (0.42 to 1.37) | 0.87 (0.49 to 1.51) | 0.98 (0.57 to 1.65) | 0.61 (0.43 to 0.85) | 1.71 (0.24 to 12.30) | † |
Ethnic group | ||||||
Black and minority ethnic groups | 1.09 (0.34 to 2.69) | 1.05 (0.51 to 2.14) | 2.94 (0.74 to 12.4) | 1.2 (0.69 to 2.09) | † | 1.78 (0.54 to 6.64) |
White | 0.97 (0.31 to 2.57) | 0.82 (0.54 to 1.25) | 2.38 (0.71 to 10.48) | 1.26 (1.05 to 1.52) | † | 0.53 (0.13 to 1.88) |
Interaction term* | 1.13 (0.35 to 3.65) | 1.28 (0.54 to 2.86) | 1.20 (0.55 to 2.60) | 0.95 (0.53 to 1.70) | † | 3.39 (0.54 to 25.36) |
Family type | ||||||
Single parent family | 1.51 (0.56 to 3.76) | 0.91 (0.21 to 3.81) | 3.00 (0.93 to 11.95) | 1.33 (0.91 to 1.92) | 2.86 (0.33 to 38.18) | † |
Two parent family | 1.17 (0.51 to 2.35) | 0.88 (0.60 to 1.29) | 3.18 (1.03 to 11.83) | 1.18 (0.99 to 1.39) | 1.40 (0.65 to 2.94) | † |
Interaction term* | 1.30 (0.51 to 3.55) | 1.04 (0.23 to 4.65) | 0.94 (0.51 to 1.74) | 1.13 (0.75 to 1.68) | 2.05 (0.17 to 37.64) | † |
Housing tenure | ||||||
Non-owner occupier | 2.83 (1.72 to 4.66) | 0.84 (0.47 to 1.52) | 1.89 (0.59 to 7.36) | 1.34 (1.02 to 1.76) | – | – |
Owner occupier | 1.56 (1.05 to 2.47) | 0.81 (0.56 to 1.14) | 1.81 (0.54 to 6.91) | 1.12 (0.93 to 1.38) | – | – |
Interaction term* | 1.80 (0.96 to 3.31) | 1.04 (0.56 to 1.97) | 1.06 (0.61 to 1.84) | 1.19 (0.85 to 1.66) | – | – |
Parental unemployment | ||||||
⩾1 parent unemployed | – | – | – | – | 2.73 (1.16 to 6.85) | † |
Both parents employed | – | – | – | – | 0.77 (0.26 to 2.23) | † |
Interaction term† | – | – | – | – | 2.56 (0.90 to 14.40) | † |
Age | ||||||
Odds ratio at age 0 | 1.34 (0.58 to 3.31) | 1.36 (0.72 to 2.62) | 2.00 (1.27 to 3.32) | 1.03 (0.75 to 1.39) | † | † |
Increase in odds ratio for 1 year increase in age | 1.20 (0.76 to 1.86) | 0.72 (0.49 to 1.06) | 2.05 (1.48 to 2.92) | 1.07 (0.86 to 1.34) | † | † |
Interaction term* | 0.90 (0.28 to 2.27) | 0.53 (0.25 to1.04) | 1.02 (0.85 to 1.22) | 1.05 (0.93 to 1.18) | † | † |
*The interaction term is the ratio of the odds ratios in the two groups. Where the 95% CI for interaction term does not include the value of 1 the effect of the intervention differs significantly between age, sex or social variables. A value >1 indicates the intervention was more effective in the group considered to be at higher risk (boys, those from ethnic minority group, single parents, non-owner occupiers, families with at least one parent not in paid employment or older children) and a value <1 indicates the intervention was less effective in the group considered to be at higher risk.
†Not calculable due to small numbers in one or more subgroups or due to insufficient number of studies (5 or fewer studies with summary data or <2 studies with IPD).
–, only calculated for housing tenure or parental unemployment.