Table 3.
Mean differences between SIB groups on MSEL and Vineland-II at age 24 months
| Persistent (n = 44) | Incident (n = 31) | Transient (n = 48) | No SIB (n = 112) | F | p | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| M | SD | M | SD | M | SD | M | SD | |||
| MSEL | ||||||||||
| Composite (ELC) | 90.3a | 18.3 | 92.4ab | 20.6 | 100.3b | 17.9 | 100.6b | 16.7 | 4.7 | 0.003 |
| Expressive language | 43.4 | 11.4 | 43.4 | 11.4 | 48.5 | 13.2 | 47.5 | 11.1 | 2.5 | 0.06 |
| Receptive language | 43.4a | 13.5 | 44.7ab | 44.7 | 50.1ab | 12.3 | 50.3b | 12.2 | 3.6 | 0.02 |
| Fine motor | 46.7 | 12.0 | 45.2 | 11.9 | 48.2 | 8.8 | 49.3 | 9.8 | 1.6 | 0.20 |
| Gross motor | 44.8a | 9.3 | 48.0a | 9.9 | 50.4b | 11.2 | 48.0ab | 8.7 | 3.7 | 0.01 |
| Visual reception | 45.6a | 9.7 | 49.4ab | 13.4 | 53.3b | 10.4 | 53.2b | 10.9 | 5.8 | 0.001 |
| Vineland-II | ||||||||||
| Composite | 93.3a | 10.2 | 96.8ab | 10.8 | 100.8b | 12.0 | 99.9b | 8.7 | 5.4 | 0.001 |
| Socialization | 93.4a | 10.9 | 96.9ab | 11.7 | 100.6b | 13.0 | 100.5b | 9.0 | 5.2 | 0.002 |
P value is omnibus comparison. Post-Hoc Tukey HSD test results with mean differences indicated by letters a and b. Means that do not share a letter are significantly different (p < .05); means that share a letter are not significantly different. MSEL mullen scales of early learning, SIB self-injurious behavior. MSEL ELC and Vineland-II Composite and Socialization scores are standardized (M = 100); MSEL subscale scores at T-scores