Table 1.

Secondary outcomes

Diagnostic outcomes parameters and measurement
Sensitivity and specificity of imaging-based strategies (CXR, LDCT and LUS)	Using panel of experts as reference
Unmasked imaging modalities in emergency	Number of unmasked imaging results (reasons shown in box 2)
Alternative diagnoses	Standardised report at the ER
Diagnosis of aspiration pneumonia	Diagnosis of panel of experts
Diagnosis of viral pneumonia Diagnosis of bacterial pneumonia	Diagnosis of panel of experts
Additional imaging studies ordered	Number of additional CXR, thoracic CT scan and US prescribed by the clinician during the acute setting
The association between biological markers and the presence of an infiltrate	C reactive protein, procalcitonin at admission
Treatment outcomes parameters and measurement
Antibiotic free days at day 30 (for any indication)	By phone or patient record
Clinical outcomes parameters and measurement
Quality of life	European Quality of Life 5 Dimensions 3 Level Version (EQ-cx5D-3L) questionnaire and CAP score questionnaire40 (pneumonia-specific quality of life questionnaire)
Length of hospital stay	Patient record
Transfer to rehabilitation or long-term care facility	Patient record
Transfer to the intensive care unit	Patient record
All cause mortality All cause readmission	Patient record, follow-up
Cost outcomes parameters and measurement
Costs	Hospital financial database using the Swiss standard called REKOLE

CAP, community-acquired pneumonia; CXR, chest X-ray; ER, emergency room; LDCT, low-dose CT; LUS, lung ultrasonography; US, ultrasonography.