Table 3 Characteristics of autistic participants by ID statusa
From: Autism through midlife: trajectories of symptoms, behavioral functioning, and health
Variable | Total (n = 406) | No ID group (n = 123) | ID group (n = 283) | t-value |
|---|---|---|---|---|
Demographic Characteristics | ||||
 T1 Age | 21.9 (9.4) [10, 52] | 18.6 (7.7) [10, 47] | 23.4 (9.7) [10, 52] | -4.87*** |
 Sex (% males) | 73.2% | 73.2% | 73.1% | Chi-sq = 0.00 |
Autism Symptoms | ||||
 ADI-R impairments in Social Reciprocity | 15.6 (5.6) [2, 28] | 12.2 (4.9) [2, 27] | 17.1 (5.2) [5, 28] | -8.86*** |
 ADI-R impairments in Non-Verbal Communication | 5.01 (2.3) [0, 8] | 4.11 (2.4) [0, 8] | 5.40 (2.1) [0, 8] | -5.44*** |
 ADI-R impairments in Verbal Communication | 9.96 (3.5) [1, 20] (n = 299) | 8.30 (3.3) [1, 16] (n = 122) | 11.1 (3.1) [1, 20] (n = 177) | -7.48*** |
 ADI-R Repetitive Behaviors | 5.42 (2.4) [0, 12] | 5.08 (2.5) [0, 11] | 5.57 (2.4) [0, 12] | -1.86 |
Behavioral Functioning | ||||
 Activities of Daily Living (W-ADL) | 19.6 (6.6) [3, 34] | 24.1 (5.7) [10, 34] | 17.7 (6.1) [3, 33] | 9.81*** |
 Maladaptive Behavior (SIB-R total score) | 115.6 (11.2) [99, 153] | 113.7 (10.9) [99, 150] | 116.4 (11.3) [100, 153] | -2.17* |
 Time spent with friends/neighbors | 1.28 (1.3) [0, 4] | 1.71 (1.3) [0, 4] | 1.10 (1.3) [0, 4] | 4.10*** |
Health | ||||
 Health rating | 3.19 (0.8) [1, 4] | 3.12 (0.8) [1, 4] | 3.21 (0.7) [1, 4] | -1.19 |
 Number of Psychotropic Medications: | 0.84 (0.9) [0, 6] | 0.75 (0.9) [0, 3] | 0.88 (1.0) [0, 6] | -1.03 |
 Number of Non-psychotropic Medications | 0.70 (0.9) [0, 4] | 0.46 (0.8) [0, 3] | 0.80 (1.0) [0, 4] | -3.57*** |