Table 1.
Estimated attainment z-scores by sociodemographic group at each time pointa and differences in rate of change over time between sociodemographic groups
| Year 2 estimate (ages 6–7), z-score difference (95% CI) |
Year 6 estimate (ages 10–11), z-score difference (95% CI) |
Year 11 estimate (ages 15–16), z-score difference (95% CI) |
Evidence for a difference in the rate of change between Year 2 and Year 6, interaction P | Evidence for a difference in the rate of change between Year 6 and Year 11, interaction P | |
|---|---|---|---|---|---|
| Gender | |||||
| Female | Reference group | – | – | – | – |
| Male | −0.29 (−0.39 to −0.18) | −0.22 (−0.33 to −0.11) | −0.36 (−0.51 to −0.20) | 0.152 | 0.081 |
| Free school meal eligibility | |||||
| Ineligible | Reference group | – | – | – | – |
| Eligible | −0.44 (−0.54 to −0.34) | −0.48 (−0.58 to −0.38) | −0.56 (−0.70 to −0.42) | 0.330 | 0.255 |
| Ethnicity | |||||
| White | Reference group | – | – | – | – |
| Black | −0.20 (−0.32 to −0.08) | −0.22 (−0.34 to −0.10) | 0.01 (−0.16 to 0.18) | 0.648 | 0.008 |
| Asian | −0.17 (−0.42 to 0.08) | −0.14 (−0.38 to 0.11) | 0.04 (−0.30 to 0.37) | 0.733 | 0.316 |
| Mixed | −0.11 (−0.27 to 0.05) | −0.16 (−0.32 to −0.00) | −0.20 (−0.42 to 0.03) | 0.453 | 0.743 |
| Other | −0.29 (−0.53 to −0.06) | −0.10 (−0.32 to 0.12) | 0.15 (−0.16 to 0.46) | 0.039 | 0.116 |
a.
Each estimate is shown at the level of the reference category for the other sociodemographic covariates and at the median age at diagnosis of depression (age 15 years).