Table 3.
Differences in sample characteristics between individuals with two or three observations
| Mean values | Tests | |||
|---|---|---|---|---|
| 2 observations | 3 observations | Statistic | p-value | |
| Age during Year 7 | 11.6 | 11.6 | 0.80 | 0.427 |
| Age during Year 9 | 13.9 | 13.9 | 1.28 | 0.200 |
| Age during Year 11 | 15.9 | 15.9 | 1.47 | 0.144 |
| Sex (Male) | 0.44 | 0.54 | 7.37 | 0.007 |
| Race (Non-White) | 0.24 | 0.21 | 0.90 | 0.343 |
| Home deprivation Score | 0.29 | 0.22 | 4.07 | < 0.001 |
| School deprivation score | 0.25 | 0.18 | 5.80 | < 0.001 |
NB. T-tests were performed for continuous data (and mean values are presented in the table), chi-squared tests for categorical (proportions are presented in the table)