Table 1. Characteristics of included studies.
CAP: community-acquired pneumonia; IRVS: intensive respiratory or vasopressor support
| Author | Year of Publication | Study Design | Outcomes | Sample Size | Cut-off of SMART-COP Score | Mean Age | Inclusion Criteria |
| Alici et al [11] | 2015 | Prospective | Need of IRVS | 84 | More than or equal to 3 | 58.6 Years | - |
| Chalmer et al [12] | 2008 | Prospective | Need of IRVS | 335 | More than or equal to 3 | <50 years | Patients less than 50 years of age and presenting with a new infiltrate on a chest radiograph. |
| Charles et al [10] | 2008 | Prospective | Need of IRVS, 30-day mortality | 862 | More than or equal to 3 | - | Age of at least 18 years, at least 1 symptom of CAP, CXR changes |
| Davis et al [13] | 2010 | Prospective | Need of IRVS | 184 | More than or equal to 3 | 50.1 Years | Adult patients with sepsis |
| Ehsanpoor et al [2] | 2019 | Prospective | Need of IRVS, 30-day mortality | 143 | More than or equal to 5 | 68.13 Years | Patients with age older than 18 years old, having at least 3 specific clinical presentations and signs of pneumonia |
| Fukuyama et al [14] | 2011 | Prospective | 30-day mortality | 298 | More than or equal to 3 | 76 Years | Patients with age greater than or equal to 18 patients and admitted to the hospital with pneumonia |
| Hamza et al [15] | 2019 | Prospective | 30-day mortality | 76 | More than or equal to 3 | 59.32 Years | Patients with age greater than or equal to 18 patients and admitted to the hospital with pneumonia |
| Masuduzzaman et al [16] | 2020 | Prospective | 30-day mortality | 54 | More than or equal to 4 | 46.74 Years | Patients with age greater than or equal to 18 patients and admitted to the hospital with pneumonia |
| Williams et al [17] | 2018 | Retrospective | 30-day mortality | 618 | More than or equal to 3 | 56 Years | Patients with age greater than or equal to 18 patients and admitted to the hospital with pneumonia |