Table 4.
Most common comorbidities in adult patients with an ADHD diagnosis from 2006 to 2011 (cross-sectional dataset, N=44,364) and in newly diagnosed adult patients from 2007 to 2011 (longitudinal dataset, N=24,921)
| Comorbidity, n (%) | All patients with ADHD and ≥1 comorbidity (n=23,344)
|
Newly diagnosed patients with ≥1 comorbidity (n=13,447)
|
||||||
|---|---|---|---|---|---|---|---|---|
| N | % by comorbiditya | % by patients with ≥1 comorbidityb | % by complete datasetc | N | % by comorbiditya | % by patients with ≥1 comorbidityb | % by complete datasetc | |
| Anxiety | 9,109 | 25.3 | 39.0 | 20.5 | 5,467 | 26.5 | 40.7 | 21.9 |
| Substance use disorder | 6,905 | 19.2 | 29.6 | 15.6 | 3,873 | 18.8 | 28.8 | 15.5 |
| Depression | 6,184 | 17.2 | 26.5 | 13.9 | 3,628 | 17.6 | 27.0 | 14.6 |
| Personality disorder | 3,835 | 10.6 | 16.4 | 8.6 | 2,262 | 11.0 | 16.8 | 9.1 |
| Asperger syndrome | 3,587 | 10.0 | 15.4 | 8.1 | 1,900 | 9.2 | 14.1 | 7.6 |
| Bipolar disorder | 3,349 | 9.3 | 14.3 | 7.5 | 1,981 | 9.6 | 14.7 | 7.9 |
| Autismd | 1,248 | 3.5 | 5.3 | 2.8 | 569 | 2.8 | 4.2 | 2.3 |
| Schizophrenia | 1,112 | 3.1 | 4.8 | 2.5 | 559 | 2.7 | 4.2 | 2.2 |
| Eating disorder | 611 | 1.7 | 2.6 | 1.4 | 365 | 1.8 | 2.7 | 1.5 |
| Impulse control disorder | 60 | 0.2 | 0.3 | 0.1 | 28 | 0.1 | 0.2 | 0.1 |
| Oppositional defiant disorder | 43 | 0.1 | 0.2 | 0.1 | 7 | <0.1 | <0.1 | <0.1 |
Notes:
a
Denominator for percentages is the total number of comorbidities (n=36,043 [all patients], n=20,639 [newly diagnosed patients]).
b
Denominator for percentages is the total number of patients with ADHD and ≥1 comorbidity (n=23,344 [all patients], n=13,447 [newly diagnosed patients]).
c
Denominator for percentages is the total number of patients in the dataset (n=44,364 [all patients], n=24,921 [newly diagnosed patients]).
d
Includes atypical autism.
Abbreviation: ADHD, attention-deficit/hyperactivity disorder.