Outcome | Group | Preindex | Postindex | Difference in the change postindex date between implementation and comparator sites* (95% CI) | P value |
Number of COPD admissions, mean (SD) | Comparator | 48.02 (21.91) | 49.33 (19.33) | 0.17 (−6.57 to 6.90) | 0.960 |
Implementation | 52.49 (18.21) | 53.93 (17.94) | |||
28-day COPD readmission rate, mean (SD) | Comparator | 11.49 (3.60) | 12.79 (4.36) | −1.31 (−5.37 to 2.75) | 0.513 |
Implementation | 15.95 (9.20) | 16.07 (11.53) | |||
28-day overall readmission rate, mean (SD) | Comparator | 23.63 (6.70) | 24.91 (7.46) | −1.17 (−4.51 to 2.17) | 0.478 |
Implementation | 23.05 (9.90) | 23.10 (9.96) | |||
90-day COPD readmission rate, mean (SD) | Comparator | 22.35 (5.59) | 23.12 (7.27) | −4.00 (−8.87 to 0.87) | 0.103 |
Implementation | 25.47 (16.42) | 22.38 (11.92) | |||
Number of ED attendances for COPD per month, mean (SD) | Comparator | 32.45 (25.17) | 37.60 (26.69) | −3.38 (−14.59 to 7.82) | 0.525 |
Implementation | 45.87 (39.27) | 47.03 (38.22) | |||
Length of stay, mean (SD) | Comparator | 6.21 (1.96) | 5.95 (1.60) | −0.30 (−1.10 to 0.51) | 0.453 |
Implementation | 6.76 (1.36) | 6.16 (1.17) | |||
Total bed days, mean (SD) | Comparator | 288.48 (156.30) | 275.86 (115.58) | 7.83 (−53.66 to 69.32) | 0.795 |
Implementation | 333.15 (121.35) | 326.37 (136.62) |
*Adjusted for the number of COPD admissions, in-hospital mortality and overall 28-day readmission for COPD in the preindex date period.
COPD, chronic obstructive pulmonary disease; ED, emergency department.