Table 4.

Medical Conditions Most Frequently Associated With Outpatient Emergency Department Care in 2012 for Medicaid-Insured Adults With Intellectual and Developmental Disabilities

Rank for Cohort	CCS Code	CCS Description	Total ED Visits	Rate per 1000	Relative Riska	95% Confidence Interval
1	239	Superficial injury/contusion	3840	52.9	3.2	3.1–3.3
2	83	Epilepsy/convulsions	3597	49.5	16.2	15.4–16.5
3	251	Abdominal pain	3534	48.7	2.2	2.1–2.3
4	657	Mood disorders	3389	46.7	13.7	13.0–13.9
5	232	Sprain/strain	2549	35.1	1.5	1.4–1.5
6	659	Schizophrenia and other psychotic disorders	2451	33.8	20.4	19.3–20.9
7	244	Other injury/condition	2288	31.5	3.9	3.7–4.0
8	102	Nonspecific chest pain	2196	30.3	1.9	1.8–1.9
9	126	Other upper respiratory tract infection	2022	27.9	2.3	2.1–2.3
10	197	Skin and subcutaneous tissue infections	1750	24.1	2.2	2.0–2.2
11	205	Spondylosis, intervertebral disc disorders, other back problems	1594	22.0	1.4	1.3–1.4
12	84	Headache, including migraine	1572	21.7	1.7	1.5–1.7
13	159	Urinary tract infections	1558	21.5	2.2	2.1–2.3
14	211	Other connective tissue disease	1448	19.9	2.5	2.3–2.6
15	133	Other lower respiratory infections	1429	19.7	3.1	2.9–3.2

Abbreviations: CCS, Clinical Classifications Software; ED, emergency department.

^aAll diagnoses in Medicaid claims were associated with significantly higher relative risk of ED care (P < .0001) in the cohort of adults with intellectual and developmental disabilities than in the benchmark population of US adults (HCUP-NEDS; HCUP, 2012).