Table 3.
Prevalence of abnormal behavior patterns, expressed as the proportion of individuals who performed a specific abnormal behavior pattern relating to the total number of study subjects.
| Prevalence | Median | Range | |
|---|---|---|---|
| Behavior Pattern | Percent (No. of Ind.) | Percent of Scans | Percent of Scans |
| DISSOCIATIVE BEHAVIORS | |||
| Stereotypic solitary play | 17 (3) | 0.9 | 0.1–1.0 |
| Floating limb | 6 (1) | 0.2 | |
| EATING DISORDERS | |||
| Coprophagy & fecal manipulation | 72 (13) | 1.0 | 0.3–2.9 |
| Regurgitation | 39 (7) | 5.4 | 0.5–41.8 |
| REPETITIVE VOCALIZATIONS | |||
| Lip spluttering | 28 (5) | 2.0 | 0.5–9.2 |
| Raspberry vocalization | 6 (1) | 0.4 | |
| Gargling vocalization | 6 (1) | 0.2 | |
| SELF-DIRECTED BEHAVIORS | |||
| Hair pulling | 67 (12) | 1.7 | 0.1–12.1 |
| Pat self | 61 (11) | 0.8 | 0.2–9.6 |
| Hand on ano-genital region | 44 (8) | 1.0 | 0.2–1.4 |
| Self-clasp | 22 (4) | 0.4 | 0.3–0.8 |
| Fumble nipple | 17 (3) | 0.4 | 0.2–0.6 |
| Self-slap | 11 (2) | 0.3 | 0.3 |
| Masturbation | 11 (2) | 0.4 | 0.2–0.6 |
| Finger nibbling and plucking | 6 (1) | 4.4 | |
| Groom pulled out hair | 6 (1) | 0.2 | |
| Finger into mouth | 6 (1) | 1.0 | |
| Nail biting | 6 (1) | 5.7 | |
| Suck hand | 6 (1) | 1.2 | |
| Ear poking | 6 (1) | 0.2 | |
| Eye poking | 6 (1) | 0.3 | |
| Anus poking | 6 (1) | 0.6 | |
| SELF-INJURIOUS BEHAVIOR | |||
| Hit self | 11 (2) | 1.9 | 0.2–3.6 |
| Self-mutilate | 6 (1) | 9.1 | |
| Excessive hair pulling | 6 (1) | 0.2 | |
| WHOLE-BODY STEREOTYPIES | |||
| Bizarre postures | 11 (2) | 0.2 | 0.2 |
| Rocking | 6 (1) | 0.3 | |
| Stereotypic locomotion | 6 (1) | 2.1 | |
| Crouching and head waving | 6 (1) | 0.2 | |
| COMBINATIONS OF TWO (ABNORMAL) BEHAVIORS | |||
| Pat self & auto-grooming | 28 (5) | 1.7 | 0.2–7.0 |
| Pat self & hair pulling | 17 (3) | 1.0 | 0.2–2.1 |
| Self-clasp & auto-grooming | 11 (2) | 0.2 | 0.1–0.2 |
| Pat self & self-clasp | 6 (1) | 0.2 | |
| Pat self & regurgitate | 6 (1) | 0.2 | |
| Bite self & auto-grooming | 6 (1) | 0.2 | |
| Hair pulling & anus poking | 6 (1) | 0.2 | |