TABLE 2

Adjusted Length of Stay and Cost of 30-Day MH Readmissions

Primary Diagnosis30-d Readmission
Mean Length of Stay, d (95% CI)Mean Cost, $ (95% CI)a
Psychosis10.3 (9.0–11.8)9024 (7822–10411)
ADHD9.6 (8.1–11.3)7707 (6522–9108)
Bipolar disorders8.7 (7.7–9.7)7319 (6429–8332)
Anxiety disorders8.2 (7.0–9.7)8447 (7175–9945)
Eating disorders8.1 (6.1–10.8)7652 (5698–10278)
Autism spectrum disorder7.9 (6.2–10.2)6956 (5452–8874)
Externalizing disorders7.4 (6.5–8.5)6238 (5414–7186)
Depression7.2 (6.5–8.0)6206 (5526–6971)
Reaction disorders6.4 (5.5–7.6)5626 (4770–6635)
Substance-related disorders3.8 (2.3–6.3)4727 (3060–7301)
Other MH diagnoses5.7 (4.2–7.6)5919 (4435–7901)
All MH conditions7.4 (6.6–8.2)6781 (5998–7667)
  • Adjusted mean length of stay and cost per readmission were estimated as marginal predictions from negative binomial and γ regression models, respectively, by using the overall cohort distributions of sex, age, and number of non-MH comorbid chronic conditions. Length of stay and cost were significantly associated with primary diagnosis (P < .001 for each block test).

  • a Cost could not be estimated because missing data for 64 (1.7%) readmissions.