Table 2 Comparison of testing patterns and test results between the low and high incidence period
Low incidence period | High incidence period | |
|---|---|---|
Patients with admission screening | 98.0% (13,011/13,284) | 93.8% (41,142/43,850) |
Admission screening positivity rate | 0.2% (22/13,284) | 2.3% (945/41,142) |
Conversion rate within 7 days after admission | 0.04% (2/4,734) | 0.5% (75/15,928) |
Patients retested within 7 days after admission | 36.4% (4,734/12,989) | 39.6% (15,928/40,197) |
Median length of stay (retested) | 5.2 days (IQR 3.2–9.6) | 6.1 days (IQR 3.6–11.0) |
Median length of stay (not retested) | 2.1 days (IQR 1.1–4.3) | 2.1 days (IQR 1.1–3.6) |
HA-COVID-19 incidence rate per 100,000 patient days | 1.0 | 10.7 |
Number of CA-COVID-19 cases | 1 | 11 |
Number of cases with an indeterminate association | 1 | 31 |
Number of probable HA-COVID-19 cases | 0 | 13 |
Number of definite HA-COVID-19 cases | 1 | 23 |
Number of SARS-CoV-2 hospital outbreaks | 0 | 5* |