TABLE 4

Multivariable Models, ED Utilization, and Rehospitalization for the First 6 Months and 30 Days

VariableRehospitalizationED Visits
6-mo OR (95% CI)30-d OR (95% CI)6-mo IRR (95% CI)30-d IRR (95% CI)
Gestational age, wk0.97 (0.91–1.03)0.93 (0.85–1.02)0.96* (0.94–0.99)0.95 (0.90–1.00)
Female0.84 (0.69–1.03)0.79 (0.57–1.07)0.88* (0.81–0.97)0.85 (0.71–1.01)
Race: black (ref = white)0.81 (0.64–1.02)0.80 (0.56–1.14)1.17* (1.05–1.31)1.09 (0.88–1.35)
Race: other (ref = white)0.92 (0.67–1.27)1.15 (0.72–1.83)1.29* (1.11–1.49)1.28 (0.96–1.69)
5-min Apgar score ≤ 51.09 (0.57–2.10)0.63 (0.20–1.99)0.52* (0.34–0.80)0.55 (0.24–1.23)
Birth weight (per 100 g)0.99 (0.97–1.02)0.99 (0.95–1.03)1.88 (0.63–5.62)1.37 (0.16–11.63)
NICU admission1.70* (1.29–2.25)1.02 (0.64–1.62)1.10 (0.95–1.27)1.05 (0.80–1.39)
Multiple gestation1.37 (0.88–2.13)1.78 (0.98–3.22)0.70* (0.53–0.91)0.82 (0.50–1.34)
Jaundice0.99 (0.77–1.28)0.96 (0.65–1.42)0.93 (0.82–1.05)0.98 (0.77–1.24)
Mechanical ventilation1.25 (0.87–1.79)0.99 (0.55–1.78)1.17 (0.97–1.40)1.41* (1.01–1.97)
Chronic lung disease1.08 (0.58–2.01)0.51 (0.15–1.76)1.02 (0.72–1.45)0.82 (0.41–1.62)
Spring (ref: winter)1.05 (0.77–1.42)0.92 (0.59–1.45)0.90 (0.79–1.03)0.99 (0.76–1.28)
Summer (ref: winter)1.21 (0.91–1.60)1.04 (0.67–1.59)1.10 (0.97–1.24)1.01 (0.79–1.30)
Fall (ref: winter)1.31 (0.99–1.74)1.15 (0.75–1.75)1.15* (1.01–1.30)1.00 (0.78–1.28)
Mother age (y)0.99 (0.97–1.01)0.99 (0.96–1.02)0.97* (0.96–0.98)0.97* (0.95–0.99)
Mother married1.00 (0.75–1.31)0.93 (0.61–1.44)0.92 (0.81–1.04)1.00 (0.78–1.29)
Mother drug/alcohol condition0.80 (0.58–1.12)0.93 (0.57–1.50)0.96 (0.82–1.13)0.96 (0.71–1.31)
Mother bipolar diagnosis1.53* (1.04–2.23)1.42 (0.81–2.50)1.06 (0.88–1.28)0.83 (0.55–1.23)
Mother depression diagnosis0.79 (0.57–1.08)0.54* (0.33–0.90)0.97 (0.83–1.12)0.97 (0.72–1.30)
Mother other mental health1.24 (0.96–1.61)1.49* (1.01–2.18)1.02 (0.90–1.15)0.85 (0.67–1.08)
Kotelchuck Index1.06 (0.74–1.51)0.86 (0.50–1.49)1.07 (0.91–1.25)0.99 (0.73–1.35)
Prenatal visit, first trimester1.12 (0.83–1.51)1.17 (0.73–1.89)1.06 (0.93–1.20)1.00 (0.77–1.31)
Mother use of opioids1.14 (0.89–1.47)1.19 (0.81–1.73)0.96 (0.86–1.08)0.91 (0.72–1.14)
Mother inpatient visits (count)1.28* (1.09–1.51)1.44* (1.16–1.78)1.02 (0.94–1.11)1.01 (0.87–1.17)
Mother ED visits (count)1.08* (1.04–1.12)1.07* (1.02–1.12)1.11* (1.09–1.12)1.07* (1.05–1.10)
Mother unique medications1.00 (0.98–1.02)1.00 (0.97–1.03)1.02* (1.01–1.03)1.04* (1.03–1.06)
Model Akaike information criterion88973163
Model C-Statistic0.670.66