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. Author manuscript; available in PMC: 2024 Aug 1.
Published in final edited form as: J Dev Behav Pediatr. 2024 Jun 13;45(3):e203–e210. doi: 10.1097/DBP.0000000000001272

Table 3.

Prevalence of Developmental Health, Functioning, Other Mental, Behavioral, or Developmental Disorders and Intervention/Support Indicators by Preschool Expulsion Among Children With ADHD, NS-DATA 2014

Expelled in Preschool
Yes
No
% (95% CI) % (95% CI) PR (95% CI) p

Developmental health
Early concerns, prior to ADHD diagnosis
 First concerns younger than 5 yra 90.9 (76.9–96.7) 54.4 (51.3–57.8) 1.7 (1.5–1.9) <0.01
 Concerns about school behavior 95.5 (85.6–98.7) 79.8 (77.0–82.3) 1.2 (1.1–1.3) <0.01
 Concerns about home behavior 72.3 (56.9–83.8) 63.2 (60.0–66.3) 1.1 (0.9–1.4) 0.18
 Concerns about behavior with friends 72.8 (56.6–84.6) 55.7 (52.4–58.9) 1.3 (1.1–1.6) 0.01
 Concerns about grades, tests, assignments 61.1 (45.2–74.8) 74.5 (71.6–77.2) 0.8 (0.6–1.1) 0.11
Symptoms at their worstb
 Severe ADHD symptoms 73.0 (59.6–83.2) 47.5 (44.2–50.7) 1.5 (1.3–1.8) <0.01
ADHD presentationc
 Combined 35.9 (22.9–51.4) 23.9 (21.1–26.9) 1.5 (1.0–2.1) 0.03
 Hyperactive/impulsive 2.8 (1.7–6.7)k 4.5 (3.3–6.0) 0.6 (0.2–1.6) 0.33
 Inattentive 29.4 (17.4–45.1) 27.7 (24.8–30.7) 1.1 (0.6–1.7) 0.81
 Subthreshold 31.8 (19.7–47.0) 43.9 (40.7–47.2) 0.7 (0.5–1.1) 0.16
Other mental, behavioral, or developmental disorders
 Any MBDDd 83.3 (70.7–91.2) 66.5 (63.4–69.4) 1.3 (1.1–1.4) <0.01
  Disruptive behaviore 37.5 (24.3–52.8) 23.1 (20.4–26.1) 1.6 (1.1–2.4) 0.02
  Emotional disordersf 57.2 (42.3–70.9) 37.1 (34.0–40.3) 1.5 (1.2–2.0) <0.01
   Anxiety 29.9 (17.7–45.9) 17.9 (15.6–20.5) 1.7 (1.02–2.8) 0.04
   Depression 14.1 (6.8–27.1)k 19.6 (17.1–22.4) 0.7 (0.4–1.5) 0.40
   OCD 32.1 (18.8–49.1) 13.8 (11.6–16.3) 2.3 (1.4–3.9) <0.01
   PTSD 11.4 (4.6–25.5) 7.0 (5.5–8.9) 1.6 (0.7–4.0) 0.28
  Developmental, learning, or language disordersg 58.8 (43.7–72.3) 47.7 (44.4–50.9) 1.2 (0.9–1.6) 0.11
Intervention and support
 School-based support 88.7 (79.1–94.2) 78.8 (75.9–81.3) 1.1 (1.03–1.2) 0.01
 Classroom management 80.3 (68.2–88.5) 57.3 (54.0–60.5) 1.4 (1.2–1.6) <0.01
 IEP or 504 plan 63.1 (47.4–76.4) 52.5 (49.2–55.7) 1.2 (0.9–1.5) 0.14
 Peer intervention 47.4 (32.7–62.7) 27.7 (24.8–30.8) 1.7 (1.2–2.4) <0.01
 Social skills training 61.5 (46.5–74.7) 36.5 (33.4–39.7) 1.7 (1.3–2.2) <0.01
 Cognitive-behavioral therapy 29.1 (16.9–45.3) 17.9 (15.4–20.6) 1.6 (1.0–2.7) 0.07
 Parent training 41.5 (27.8–56.6) 28.6 (25.8–31.7) 1.5 (1.0–2.1) 0.05
Impact on functioning
 Expulsion in later gradesh 13.0 (6.3–24.9)k 11.8 (9.7–14.2) 1.1 (0.5–2.3) 0.75
School difficultiesi
 Overall school performance 61.4 (46.8–74.2) 45.2 (41.9–48.5) 1.4 (1.1–1.7) 0.01
 Writing 67.2 (52.7–79.1) 49.8 (46.5–53.1) 1.3 (1.1–1.7) 0.01
 Reading 41.2 (27.1–57.0) 40.1 (36.9–43.3) 1.0 (0.7–1.5) 0.88
 Math 45.6 (31.1–60.8) 44.0 (40.8–47.2) 1.0 (0.7–1.5) 0.84
 Handwriting 60.0 (45.1–73.3) 40.5 (37.3–43.8) 1.5 (1.1–1.9) <0.01
 Organized activitiesj 51.1 (36.0–65.9) 28.5 (25.6–31.6) 1.8 (1.3–2.5) <0.01
Social impact
 Parental relationships 36.5 (23.1–52.3) 21.2 (18.6–24.0) 1.7 (1.1–2.6) 0.01
 Sibling relationships 39.4 (24.6–56.4) 30.3 (27.2–33.6) 1.3 (0.8–2.0) 0.23
 Peer relationships 38.4 (24.9–54.0) 27.6 (24.8–30.7) 1.4 (0.9–2.1) 0.11
Work and financial impact
 Work stoppage 16.5 (9.2–27.8)k 13.8 (11.6–16.4) 1.2 (0.7–2.1) 0.55
 Work reduction 32.6 (20.4–47.8) 19.0 (16.6–21.8) 1.7 (1.1–2.7) 0.02
 Financial impact 26.7 (17.2–39.0) 20.8 (18.2–23.7) 1.3 (0.8–2.0) 0.26

ADHD, attention-deficit/hyperactivity disorder; IEP, individualized education program; MBDD, mental, behavioral, or developmental disorders; NS-DATA, National Survey of the Diagnosis and Treatment of ADHD and Tourette Syndrome; OCD, obsessive-compulsive disorder; PTSD, post-traumatic stress disorder.

a

Age at first concern younger than 5 yr.

b

Severe versus mild/moderate ADHD symptoms at their worst.

c

Combined: 6 or more hyperactive/impulsive and 6 or more inattentive symptoms. Hyperactive/impulsive: 6 or more hyperactive/impulsive symptoms but less than 6 inattentive symptoms. Inattentive: 6 or more hyperactive/impulsive symptoms but less than 6 hyperactive/impulsive symptoms. Subthreshold: less than 6 symptoms on both scales. Symptoms reported for the 6-month period before the survey.

d

Child ever received a diagnosis of conduct disorder, oppositional defiant disorder, autism spectrum disorder, intellectual disability, learning disorder, language disorder, OCD, PTSD, anxiety, bipolar disorder, and/or depression.

e

Child ever received a diagnosis of conduct disorder and/or oppositional defiant disorder.

f

Child ever received a diagnosis of OCD, PTSD, anxiety, bipolar disorder, and/or depression.

g

Childreceived a diagnosis of autism spectrum disorder, intellectual disability, learning disorder, and language disorder.

h

Child was also expelled in grades K-12.

i

Based on child’s behavior when not taking medication for ADHD or other difficulties with emotions, behavior, or concentration.

j

Includes only children who participated in organized activities (95% of unweighted sample).

k

The relative standard error for this estimate is between 30% and 40%; estimate should be interpreted with caution.

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