TABLE 2.
Association between 30‐day mortality and crowding category (based on ED census vs expected)
| Crowding category (ED census vs expected during shift) | ||||
|---|---|---|---|---|
| 0%–75% | 75%–95% | 95%–100% | ||
| 30‐day mortality | Number of deaths, n | 24,551 | 6,482 | 1,687 |
| Person‐years at risk, n | 117,540 | 31,423 | 7,872 | |
| Incidence rate, cases/100 person‐years | 20.9 | 20.6 | 21.4 | |
| Adjusted a HR (95% CI) | Reference | 1.00 (0.98–1.03) | 1.08 (1.03–1.14) | |
| Adjusted b HR (95% CI) | Reference | 1.00 (0.97–1.03) | 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 ED census versus expected during the shift that the patient arrived
CI, confidence interval; ED, emergency department; HR, hazard ratio.
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.