Table 6.
Outcomes of chronic obstructive pulmonary disease patients, according to the number of emergency department visits, stratified by state
| Variables | 1 ED visit | 2 ED visits | ≥ 3 ED visits | P value |
|---|---|---|---|---|
|
California |
|
|
|
|
| Number of ED visits for COPD, no. |
33,741 |
16,594 |
26,100 |
– |
| 30-day ED revisit rate for COPD, % (95% CI)* |
– |
11.1 (10.6-11.6) |
31.7 (31.2-32.3) |
<0.001 |
| Hospitalization rate for COPD, % (95% CI) |
55.7 (55.2-56.2) |
54.6 (53.9-55.4) |
54.5 (53.9-55.1) |
<0.001 |
| Near-fatal event rate, % (95% CI) |
6.8 (6.5-7.1) |
9.2 (8.7-9.6) |
9.6 (9.2-9.9) |
<0.001 |
|
Florida |
|
|
|
|
| Number of ED visits for COPD, no. |
35,657 |
17,416 |
25,228 |
– |
| 30-day ED revisit rate for COPD, % (95% CI)* |
– |
9.8 (9.4-10.3) |
28.2 (27.6-28.8) |
<0.001 |
| Hospitalization rate for COPD, % (95% CI) |
68.6 (68.1-69.0) |
71.7 (71.0-72.3) |
69.9 (69.3-70.4) |
<0.001 |
| Near-fatal event rate, % (95% CI) |
4.9 (4.7-5.1) |
7.3 (6.9-7.7) |
9.9 (9.5-10.3) |
<0.001 |
|
Nebraska |
|
|
|
|
| Number of ED visits for COPD, no. |
2009 |
1060 |
1301 |
|
| 30-day ED revisit rate for COPD, % (95% CI)* |
– |
8.6 (7.0-10.4) |
27.2 (24.8-29.7) |
<0.001 |
| Hospitalization rate for COPD, % (95% CI) |
52.5 (50.3-54.7) |
56.6 (53.6-59.6) |
53.0 (50.2-55.7) |
0.08 |
| Near-fatal event rate, % (95% CI) | 6.9 (5.8-8.1) | 7.9 (6.4-9.7) | 11.2 (9.6-13.1) | <0.001 |
Abbreviations: COPD chronic obstructive pulmonary disease, ED emergency department, IQR interquartile range CI confidence interval.
*Excluding the index ED visits and hospitalizations.