Characteristics Number (%)
Personal data  
Female gender 452 (89.7)
Median age [years (IQR)] 42 (28-51)
No children living at home 289 (58.5)
Educational level ≤ VETa  level 3 379 (76.6)
Pregnant [females only] 12 (2.7)
Professional data  
Median years working in health care [years (IQR)] 11 (4-21)
Median working hours a week [h (IQR)] 28 (22-32)
Not evening or night shifts 194 (37.0)
Mean number of beds in nursing home 142.8
No influenza outbreak in the last 3 years 399 (76.1)
Profession  
Nurse 43 (8.2)
Nurse assistant 274 (52.3)
Physician 19 (3.6)
Paramedic 44 (8.4)
Support staff 144 (27.5)
Type of ward where personnel is employed  
Only revalidation 51 (10.6)
Only psychogeriatric 155 (32.1)
Only somatic 57 (11.8)
Combination of wardsb 206 (42.7)
Other (e.g., reception, restaurant, therapeutic care etc.) 14 (2.7)
aVocational Education and Training (e.g., caretaker assistant is level 2, caretaker/ nurse assistant is level 3, nurse is level 4)
bMore than one type of ward possible
Table 1: Baseline characteristics of the study subjects.