Associations between the number of bruises and developmental stage and other child-level factors; the ratios of means, and the associated 95% CIs, between the category of the factor and the reference category
| Factor | Ratio of means | 95% CIs |
|---|---|---|
| Development stage | ||
| Premobile | 0.06 | 0.04 to 0.09 |
| Early mobile (reference) | 1 | |
| Walking | 2.28 | 1.73 to 2.99 |
| Gender (female) | 0.84 | 0.64 to 1.09 |
| Any sibling | 1.51 | 1.15 to 1.99 |
| Season | ||
| January–March (reference) | 1 | |
| April–June | 0.99 | 0.82 to 1.20 |
| July–September | 0.94 | 0.74 to 1.18 |
| October–December | 0.82 | 0.63 to 1.06 |
| Ethnicity | ||
| White | 1 | |
| Ethnicity (not White) | 0.90 | 0.46 to 1.79 |
| Not recorded | 0.84 | 0.58 to 1.23 |
| Deprivation | ||
| Quintile 1 | 1 | |
| Quintile 2 | 0.96 | 0.70 to 1.32 |
| Quintile 3 | 1.14 | 0.79 to 1.65 |
| Quintile 4 | 0.94 | 0.59 to 1.48 |
| Quintile 5 | 1.56 | 0.91 to 2.66 |