Table 1 Characteristics of all nosocomial SARS-CoV-2 cases in patients treated between May 2020 and January 2021 (n = 170)

Difference in days between hospital admission and first positive test

11 (7–17)

Age

Years

70 (58–80)

Sex

Female

78 (45.9%)

Male

92 (54.1%)

Charlson Comorbidity Index

6 (4–8)

Admission via ER

Yes

101 (59.4%)

Ward specialty of first in-patient ward (excluding ER)

MED

66 (38.8%)

SUR

40 (23.5%)

HEM

20 (11.8%)

PSY

9 (5.3%)

OTH

9 (5.3%)

ICU

26 (15.3%)

Ward specialty of ward with first positive test

MED

76 (44.7%)

SUR

53 (31.2%)

HEM

19 (11.2%)

PSY

9 (5.3%)

OTH

5 (2.9%)

ICU

8 (4.7%)

ICU-stay during the relevant timeframe

Yes

43 (25.3%)

Number of documented procedure codes in the patient files during the relevant timeframe

6 (3–10)

Number of ward transfers during the relevant timeframe

1 (0–2)

Number of patient room transfers during the relevant timeframe

2 (1–3)

Number of contact patients during relevant timeframe

4 (2–7)

Number of contact patient-days during relevant timeframe

17 (9–28)

Present at a ward with a SARS-CoV-2 outbreak reported to authorities during the stay or up to 14 days later

Yes

157 (92.4%)

Documented contact to a (suspected) SARS-CoV-2 case during the relevant timeframe

Yes

93 (54.7%)

Documented contact to a (suspected) SARS-CoV-2 case during the relevant timeframe before hospital admission

Yes

1 (0.6%)

Documented contact to a (suspected) SARS-CoV-2 case during the relevant timeframe after hospital admission

Yes

92 (54.1%)

Documented contact to (suspected) SARS-CoV-2 positive patients during the relevant timeframe*

Yes

68 (40%)

Documented contact to (suspected) SARS-CoV-2 positive staff during the relevant timeframe*

Yes

32 (18.8%)