TABLE 1

Hospital Characteristics and Their Association with 30-Day Readmission

Hospital CharacteristicIndex Admission, n (%)All-Cause Readmission (n = 6346, 7.69%)Pneumonia-Specific Readmission a (n = 2537, 3.07%)
Unadjusted ORs for 30-d Readmission (95% CI)Adjusted OR for 30-d Readmission (95% CI)Unadjusted ORs for 30-d Readmission (95% CI)Adjusted ORs for 30-d Readmission (95% CI)
Geographic region
 Northeast8889 (10.77)RefRefRefRef
 South32 941 (39.90)0.82 (0.75–0.89)**0.84 (0.73–0.98) * 0.86 (0.75–0.98)**0.87 (0.71–1.06)
 Midwest22 528 (27.28)0.98 (0.90–1.07)1.05 (0.90–1.21)1.01 (0.88–1.16)1.03 (0.87–1.23)
 West18 208 (22.05)0.87 (0.79–0.95) * 0.83 (0.74–0.93)**0.93 (0.80–1.07)0.91 (0.77–1.08)
No. of annual admissions
 Q1 (<12 337)13 913 (16.85)RefRefRefRef
 Q2 (12 337–14 768)19 073 (23.10)1.11 (1.02–1.21)1.07 (0.94–1.21)1.07 (0.94–1.22)1.05 (0.89–1.24)
 Q3 (14 769–18 218)21 897 (26.52)1.12 (1.03–1.22)1.10 (0.97–1.25)1.06 (0.93–1.20)1.04 (0.90–1.21)
 Q4 (>18 218)27 683 (33.53)1.16 (1.08–1.26)**1.19 (1.00–1.27)1.11 (0.98–1.25)1.13 (0.90–1.40)
No. of annual pneumonia admissions
 Q1 (<290)10 941 (13.25)RefRefRefRef
 Q2 (290–456)14 944 (18.10)1.06 (0.97–1.16)0.83 (0.71–0.97) * 1.12 (0.97–1.29)0.95 (0.75–1.21)
 Q3 (457–606)23 131 (28.02)0.99 (0.91–1.08)0.87 (0.77–1.00) * 1.02 (0.90–1.16)0.93 (0.76–1.15)
 Q4 (>606)33 550 (40.63)0.90 (0.83–0.97)**0.78 (0.66–0.91) * 0.93 (0.82–1.06)0.87 (0.69–1.09)
Payer mix (% government)
 Q1 (<48%)19 779 (23.96)RefRefRefRef
 Q2 (48%–56%)21 612 (26.18)0.91 (0.85–0.98) * 1.01 (0.89–1.15)0.98 (0.87–1.09)1.10 (0.92–1.32)
 Q3 (57%–65%)19 007 (23.02)1.05 (0.97–1.13)1.10 (0.95–1.28)1.06 (0.95–1.19)1.14 (0.91–1.32)
 Q4 (>65%)22 168 (26.85)0.96 (0.89–1.03)1.09 (0.99–1.21)0.96 (0.86–1.07)1.12 (0.94–1.34)
  • Q1, quartile 1; Q2, quartile 2; Q3, quartile 3; Q4, quartile 4.

  • * P < .05; ** P < .01.

  • a Readmission within 30 days of discharge from index hospitalization with diagnosis of pneumonia in any diagnosis field (ICD-9 codes 481–483.8, 485–486)