Table 3.
Prevalence of symptoms by self-reported IQ level
| Section | Symptom | Normal (IQ ≥70) n = 90 (%) |
Mild/moderate disability (IQ 35–69) n = 93 (%) |
Severe/ profound disability (IQ <35) n = 51 (%) |
Normal vs abnormal IQ χ2 (p value)a,b,c |
|---|---|---|---|---|---|
| Section 3 | Anxiety | 67.8 | 74.2 | 58.8 | 0.02 (0.88) |
| Depressed mood | 44.4 | 40.9 | 25.5 | 1.90 (0.17) | |
| Extreme shyness | 32.2 | 25.8 | 17.6 | 2.46 (0.12) | |
| Mood Swings | 54.4 | 64.5 | 68.6 | 3.11 (0.08) | |
| Aggressive outburst | 38.9 | 55.9 | 66.7 | 9.63 (0.002) * | |
| Temper tantrums | 33.3 | 57.0 | 58.8 | 13.10 (0.0003) * | |
| Self-injury | 14.4 | 25.8 | 58.8 | 14.41 (< 0.0001) * | |
| Delayed language | 27.8 | 62.4 | 88.2 | 42.78 (< 0.0001) * | |
| Repeats words | 28.9 | 63.4 | 56.9 | 23.02 (< 0.0001) * | |
| Poor eye contact | 28.9 | 46.2 | 60.8 | 11.46 (0.0004) * | |
| Difficulty with peers | 34.4 | 55.9 | 49.0 | 8.07 (0.0007) * | |
| Repetitive behaviors | 34.4 | 57.0 | 76.5 | 19.26 (< 0.0001) * | |
| Rigid/inflexible | 44.4 | 67.7 | 66.7 | 11.98 (0.0005) * | |
| Overactive | 31.1 | 41.9 | 51.0 | 4.55 (0.03) * | |
| Difficulties with attention | 58.9 | 78.5 | 86.3 | 13.94 (0.0002) * | |
| Restlessness | 42.2 | 51.6 | 76.5 | 7.37 (0.007) * | |
| Impulsivity | 40.0 | 71.0 | 64.7 | 18.76 (< 0.0001) * | |
| Difficulty with eating | 27.8 | 39.8 | 72.5 | 12.65 (0.0004) * | |
| Sleep difficulties | 56.7 | 63.4 | 56.9 | 0.45 (0.50) | |
| Section 4 d | ASD | 17.8 | 37.6 | 51.0 | 15.16 (< 0.0001) * |
| ADHD | 34.4 | 41.9 | 27.5 | 0.13 (0.71) | |
| Anxiety disorder | 32.2 | 31.2 | 17.6 | 0.92 (0.34) | |
| Depressive | 21.1 | 25.8 | 11.8 | 0.00 (0.96) | |
| OCD | 16.7 | 26.9 | 25.5 | 2.99 (0.08) | |
| Psychotic | 3.3 | 9.7 | 11.8 | 3.91 (0.05) * | |
| Section 6 | Reading | 40.0 | 78.3 | 62.0 | 24.28 (< 0.0001) * |
| Writing | 34.4 | 75.0 | 62.0 | 29.01 (< 0.0001) * | |
| Spelling | 30.0 | 70.7 | 64.0 | 32.49 (< 0.0001) * | |
| Mathematics | 33.3 | 85.9 | 64.0 | 46.45 (< 0.0001) * | |
| Section 7 | Memory | 37.8 | 52.7 | 68.0 | 9.13 (0.001) * |
| Attention | 60.0 | 86.8 | 82.0 | 18.63 (< 0.0001) * | |
| Multi-tasking | 58.9 | 93.4 | 88.0 | 34.93 (< 0.0001) * | |
| Visuo-spatial tasks | 25.6 | 58.2 | 80.0 | 35.87 (< 0.0001) * | |
| Executive skills | 53.3 | 91.2 | 84.0 | 36.44 (< 0.0001) * | |
| Getting disoriented | 20.0 | 49.5 | 72.0 | 31.46 (< 0.0001) * |
aAbnormal is defined as anyone with IQ < 70 (includes mild, moderate, severe, and profound groups)
bChi-square analysis with 1 degree of freedom
c*represents p value that stayed significant (< 0.05) after FDR-adjustment
dSection 4 was not included in the cluster or factor analyses