Table 2

Pooled OR estimates of specific risk factors (%) and associated 95% CI

Risk factorStudies
(n)
CategorySubjects
(n)
Number with 30-day hospital readmissionPooled OR
(95% CI)
Demographics
Gender16Female1 131 305148 1670.94 (0.91 to 0.97)
Male1 032 472156 109
Age8≥65887 353122 7101.23 (1.08 to 1.40)
<65608 47178 647
Race14White1 452 006198 3370.89 (0.84 to 0.94)
Non-White663 47599 747
Insurance type7Medicare and Medicaid589 37697 9761.41 (1.22 to 1.63)
Private insurance221 07829 042
Comorbidities
Heart failure4Yes917320521.81 (1.67 to 1.96)
No33 2834941
Respiratory disease8Yes135 28124 2031.33 (1.31 to 1.36)
No468 25766 317
Depression6Yes62 87110 5241.32 (1.20 to 1.45)
No441 23351 700
Renal disease4Yes84 59516 6711.69 (1.34 to 2.12)
No330 96644 477
Hypertension6Yes194 36530 2921.01 (0.98 to 1.03)
No114 34915 172
Diabetes-related medication
Insulin therapy5Yes272 42038 4401.45 (1.24 to 1.71)
No637 55470 684
Inpatient factor
Length of stay (days)31 996 9091.06 (1.01 to 1.12)