Table 2.

Marginal Effects from the Logistic Regression Models of Follow-Up Visits and Readmissions among the Uninsured Adults with Mental Health Conditions Who Were Enrolled in the Low-Income Health Program in San Diego County from 2012 to 2013, Based on Enrollment and Claims Data

15-Day Follow-Up Visit (N = 796)30-Day Readmission (N = 251)
Marginal EffectP value95% CIMarginal EffectP value95% CI
Had 15-day outpatient follow-up visit−2.5%.021[−0.05, 0.00]
(ref. group did not have 15-day follow-up visit)
Use within 6 months prior to index admission
Evaluation and management visits5.8%.000[0.04, 0.08]0.9%.054[0.00, 0.02]
Emergency department visits2.6%.194[−0.01, 0.07]3.2%.001[0.01, 0.05]
Index admission was surgical (ref. group medical)−5.5%.059[−0.11, 0.00]−1.0%.696[−0.06, 0.04]
Average enrollment (in months) prior to index admission0.3%.069[0.00, 0.01]−0.4%.000[−0.01, 0.00]
Severity indicators
Length of stay of index admission in days1.2%.001[0.00, 0.02]0.5%.039[0.00, 0.01]
CDPS risk score2.5%.004[0.01, 0.04]1.6%.000[0.01, 0.02]
Substance abuse−8.9%.000[−0.12, −0.06]4.9%.007[0.01, 0.09]
Depression−0.1%.606[−0.05, 0.03]1.1%.373[−0.05, 0.00]
Schizophrenia−4.8%.173[−0.12, 0.02]0.8%.719[−0.04, 0.05]
Bipolar disorder4.8%.131[−0.01, 0.11]1.3%.525[−0.03, 0.05]
Demographics
Female2.3%.351[−0.03, 0.07]−2.4%.103[−0.05, 0.00]
(ref. group male)
Age (ref. group 18 to 34)
    35 to 4412.0%.000[0.07, 0.17]−0.5%.789[−0.04, 0.03]
    45 to 5410.1%.000[0.07, 0.13]−1.4%.528[−0.06, 0.03]
    55 to 6516.5%.000[0.12, 0.21]−1.4%.550[−0.06, 0.03]
Race/ethnicity
(ref. group white)
    African American−10.8%.007[−0.19, −0.03]−3.0%.026[−0.06, 0.00]
    Latino1.7%.520[−0.03, 0.07]−0.3%.857[−0.03, 0.03]
    Asian American0.9%.832[−0.07, 0.09]−6.5%.015[−0.12, −0.01]
    Other−5.4%.735[−0.36, 0.26]16.1%.224[−0.10, 0.42]
    Missing−1.5%.652[−0.08, 0.05]−0.2%.913[−0.04, 0.04]
  • CI, confidential interval. CDPS (Chronic Illness and Disability Payment System) measures severity based on utilization of services with a combination of acute and chronic diagnoses.