Settings and populations used in content validity evaluation of CAP-specific PROM instruments
| Instrument | Study reference | Setting | Population | Disease | Mode of instrument administration | Recall period |
| CAP-Sym | Lamping et al29 | 62% hospitalised. Participants from 13 countries. | n=556 Mean (SD) age 50.4 (18.7) years. 13 language groups. | Any severity | Unspecified | On day of completion |
| CAP-BIQ | Wyrwich et al19 | 60% outpatients. Participants from USA. | n=500 Mean (SD) age 62.4 (8.6) years. 51% college educated. | Any severity | Web-based self-administration | Up to 120 days after diagnosis |
| CAP Score | El Moussaoui et al30 | All hospitalised. Participants from the Netherlands. | n=67 Mean (SD) age 56 (17.8) years. | Severe excluded | Face-to face or telephone interview | Up to 1 month |
| Metlay Score 1 | Metlay et al31 | 65% outpatients. Participants from USA and Canada. | n=576 78% aged <60 years. 33% college educated. | Low-risk of mortality only | Face-to face or telephone interview or self-complete. | Up to 1 month |
| Metlay Score 2 | Metlay et al32 | 56% outpatients. Participants from USA. | n=126 Mean age 52.7 years. | Low-risk of mortality only | Administered daily in self-complete diary format | On day of completion |
CAP, community-acquired pneumonia;CAP-BIQ, CAP Burden of Illness Questionnaire;CAP-Sym, CAP Symptom Questionnaire;PROM, patient-reported outcome measure.