Table 6.
Frequency Counts, Percentages, and Population Estimates for the Identified Latent Classes
| Latent Class Designation |
|||||||
|---|---|---|---|---|---|---|---|
| Grade | Grade | Grade | Grade | Population Estimate | |||
| Class | 2 | 4 | 8 | 10 | Frequency | Percent | |
| TD | 1 | 1 | 1 | 1 | 255 | 51.7 | 67.8 |
| TD | 1 | 2 | 1 | 1 | 1 | 0.2 | 0.1 |
| Total | 256 | 51.9 | 67.9 | ||||
| LERD-W | 1 | 2 | 2 | 2 | 26 | 5.2 | 4.5 |
| LERD-W | 1 | 3 | 4 | 2 | 3 | 0.6 | 0.3 |
| Total | 29 | 5.8 | 4.8 | ||||
| LERD-CW | 1 | 3 | 4 | 4 | 8 | 1.6 | 1.0 |
| LERD-CW | 1 | 3 | 3 | 4 | 3 | 0.6 | 0.3 |
| LERD-CW | 1 | 1 | 3 | 4 | 1 | 0.2 | 0.1 |
| LERD-CW | 1 | 2 | 4 | 4 | 1 | 0.2 | 0.2 |
| Total | 13 | 2.6 | 1.6 | ||||
| LERD-C | 1 | 3 | 3 | 3 | 37 | 7.5 | 5.1 |
| LERD-C | 1 | 1 | 3 | 3 | 14 | 2.8 | 1.9 |
| Total | 51 | 10.3 | 7.0 | ||||
| LETD | 4 | 1 | 1 | 1 | 7 | 1.4 | 1.0 |
| LETD | 4 | 2 | 1 | 1 | 3 | 0.6 | 0.5 |
| LETD | 2 | 2 | 1 | 1 | 1 | 0.2 | 0.4 |
| Total | 11 | 2.2 | 1.9 | ||||
| EIRD-W | 2 | 2 | 2 | 2 | 19 | 3.8 | 3.0 |
| EIRD-W | 4 | 4 | 2 | 2 | 15 | 3.0 | 2.0 |
| EIRD-W | 4 | 2 | 2 | 2 | 13 | 2.6 | 2.9 |
| EIRD-W | 2 | 4 | 4 | 2 | 1 | 0.2 | 0.1 |
| EIRD-W | 4 | 4 | 4 | 2 | 1 | 0.2 | 0.1 |
| EIRD-CW | 4 | 4 | 4 | 4 | 52 | 10.5 | 5.2 |
| EIRD-CW | 4 | 2 | 4 | 4 | 11 | 2.2 | 0.9 |
| EIRD-CW | 2 | 2 | 4 | 4 | 4 | 0.8 | 0.3 |
| EIRD-CW | 2 | 4 | 4 | 4 | 7 | 1.4 | 0.8 |
| EIRD-CW | 4 | 2 | 4 | 4 | 1 | 0.2 | 0.4 |
| EIRD-C | 2 | 2 | 2 | 3 | 3 | 0.6 | 0.4 |
| EIRD-C | 4 | 4 | 2 | 3 | 2 | 0.4 | 0.4 |
| EIRD-C | 4 | 3 | 3 | 3 | 4 | 0.8 | 0.3 |
| Total | 133 | 26.9 | 16.8 | ||||
Note. TD = typically developing; LERD = late emerging RD; LETD = late emerging typically developing; EIRD = early identified RD; W = word reading only; C= comprehension only; CW = comprehension + word reading; 1 = NR; 2 = RD-W; 3 = RD-C; 4 = RD-CW.