Cohort by RGL
| RGL | <5th | 5–6th | 7–8th | 9–11th | ≥12th | p Value* |
|---|---|---|---|---|---|---|
| N (%) | N (%) | N (%) | N (%) | N (%) | ||
| Race/ethnicity | <0.0001* | |||||
| Hispanic | 161 (28.2) | 159 (28.3) | 151 (23.1) | 211 (15.8) | 211 (10.2) | |
| Black | 329 (57.6) | 287 (51.1) | 279 (42.7) | 280 (20.9) | 83 (9.2) | |
| Non-Black/Hispanic | 82 (14.3) | 116 (20.6) | 223 (34.2) | 847 (63.3) | 725 (80.6) | |
| In poverty 1979 | 319 (55.8) | 233 (41.5) | 186 (28.5) | 215 (16.1) | 68 (7.6) | <0.0001 |
| Siblings (median) | 5.0 | 4.0 | 4.0 | 3.0 | 2.0 | 0.001† |
| Parity (median) | 3.0 | 2.0 | 2.0 | 2.0 | 2.0 | 0.001† |
| Parous in 1980 | 207 (42.0) | 126 (27.4) | 132 (25.6) | 200 (19.3) | 91 (13.9) | <0.0001* |
| Grand multiparous | 59 (10.3) | 43 (7.7) | 25 (3.8) | 33 (2.5) | 23 (2.6) | <0.0001† |
Note: Percentages do not add to 100% in all cases.
RGL, Reading Grade Level.
*p Values reported for Pearson's χ2 test comparing all RGL.
†p Values reported for Kruskal-Wallis test comparing all RGL.