Table 4.

Multivariate mixed effects logistic regression for all-cause and similar-cause 30-day readmission

VariableOdds Ratio for All-Cause Readmission (95% CI)Odds Ratio for Similar-Cause Readmission (95% CI)
Age
 0–2 yrReferenceReference
 ≥2 yra0.6 (0.5 to 0.81)0.6 (0.5 to 0.9)
Modality
 Peritoneal dialysisReferenceReference
 Hemodialysisa1.2 (1.0 to 1.4)1.4 (1.1 to 1.8)
Length of stay
 1 dReferenceReference
 2–6 d1.0 (0.8 to 1.2)1.1 (0.7 to 1.4)
 7–13 d0.9 (0.7 to 1.3)1.2 (0.8 to 1.8)
 ≥14 da1.5 (1.0 to 1.8)2.3 (1.6 to 3.4)
Comorbid conditions
 0ReferenceReference
 1–20.9 (0.7 to 1.25)1.4 (0.9 to 2.1)
 ≥31.0 (0.8 to 1.3)0.9 (0.6 to 1.2)
Operating room charge
 NoReferenceReference
 Yesa0.6 (0.5 to 0.8)0.4 (0.3 to 0.6)
  • Odds ratios and 95% CIs were calculated using mixed-effects logistic regression, clustering by patient within hospital to account for repeated admissions across multiple centers.

  • a P<0.05.