TABLE 3.
Association between 30‐day mortality and crowding category (based on ED LOS vs expected)
| Crowding category (ED LOS vs expected during shift) | ||||
|---|---|---|---|---|
| 0%–75% | 75%–95% | 95%–100% | ||
| 30‐day mortality | Number of deaths, n | 24,132 | 6,764 | 1,824 |
| Person‐years at risk, n | 117,511 | 31,440 | 7,885 | |
| Incidence rate, cases/100 person‐years | 20.5 | 21.5 | 23.1 | |
| Adjusted a HR (95% CI) | Reference | 1.01 (0.98–1.04) | 1.08 (1.02–1.14) | |
| Adjusted b HR (95% CI) | Reference | 1.01 (0.98–1.04) | 1.08 (1.03–1.14) | |
Significant association between 30‐day mortality and the highest category of crowding 95%‐100%, among 884,228 patients with 2,252,656 visits to 7 emergency departments in Stockholm Region, Sweden, from 2012 to 2016. Crowding category was based on mean ED LOS versus expected during the shift that the patient arrived.
CI, confidence interval; ED, emergency department; HR, hazard ratio; LOS, length of stay.
a
stratified by hospital, adjusted for age, sex, priority, weekend, hour, arrival mode, and chief complaint.
b
stratified by hospital, adjusted for age, sex, priority, weekend, hour, arrival mode, chief complaint, prior hospital admissions, and comorbidities.