Table 6 Sample attritions
Sample selection criteria | Grade 3 (wave 2) | Grade 5 (wave 3) | Grade 7 (wave 4) | All |
|---|---|---|---|---|
All children in the original sample | 4464 | 4331 | 4169 | 12,964 |
Children having any NAPLAN test | 2979 | 3940 | 3531 | 10,450 |
Children having all five NAPLAN tests | 2865 | 3785 | 3358 | 10,008 |
Final sample with no missing information on basic controls | 2471 | 3225 | 2801 | 8497 |
Sample attrition due to missing information on basic controls | 394 | 560 | 557 | 1511 |
 Sample attrition due to missing pre-school PPVT | 286 | 370 | 303 | 959 |
 Sample attrition due to missing pre-school WAI | 30 | 41 | 30 | 101 |
 Sample attrition due to missing pre-school PPVT and WAI | 296 | 382 | 313 | 991 |
 Sample attrition due to missing household income | 57 | 121 | 181 | 359 |
 Sample attrition due to missing pre-school PPVT and WAI and household income | 347 | 485 | 470 | 1302 |