Atopic Dermatitis in US Adults: From Population to Health Care Utilization.

Background: Little is known about the predictors of health care utilization among US adults with atopic dermatitis (AD).

Objective: To determine the proportion and predictors of utilization in outpatient, urgent care, emergency department (ED), and hospital settings in US adults with AD.

Methods: A cross-sectional, population-based study of 3495 adults was performed. AD was determined using modified United Kingdom Working Party criteria. AD severity was assessed using the Patient-Oriented Eczema Measure (POEM), the Patient-Oriented Scoring AD (PO-SCORAD), and the Numeric Rating Scale (NRS)-itch. Weighted frequency and prevalence (95% CIs) of utilization were determined.

Results: Overall, 10.42% (95% CI, 8.55%-12.28%; weighted frequency, 25,844,871) reported a diagnosis of AD or eczema, 7.39% (95% CI, 5.81%-8.97%; weighted frequency, 18,324,869) met United Kingdom Working Party criteria, and 3.56% (95% CI, 2.40%-4.72%; weighted frequency, 8,830,095) met both. A total of 31.8% (2,711,690) had a severe score for POEM, PO-SCORAD, and/or NRS-itch, with 4.0% (337,586) having severe scores for all 3. Outpatient utilization for AD was low for mild disease (29.3%-34.7%) and increased by severity (moderate: 36.2%-49.8%; severe: 50.6%-86.6%). Timeliness of appointments, expenses, and insurance coverage were also predictors of outpatient utilization. Severe POEM, PO-SCORAD, and/or NRS-itch were associated with being uninsured, not having full prescription coverage, AD prescriptions being denied by insurers, and costs of AD medications being problematic. One in 10 adults with AD had 1 or more urgent care, ED, or hospital visit in the past year. Urgent care or ED visits were significantly more common among blacks and Hispanics, those with lower household income, those with lower education level, and those with AD prescriptions being denied by the insurance company.

Conclusions: Adults with AD had low rates of outpatient and high rates of urgent care, ED, and hospital visits. The major predictor of outpatient utilization for AD care was AD severity. Racial/ethnic, socioeconomic, and/or health care disparities reduce outpatient utilization and increase urgent care, ED, and hospital utilization.