Individuals with COVID-19, n^{a} | 51 | 88 | |

Swab PCR positive, n | 41/51 | 79/85^{b} | |

Mean age, years | 58 | 66 | p<0.001 (T test) |

Male, n (%) | 37 (73) | 64 (73) | |

Ethnicity, n (%) | | | p=0.93 (chi-squared test) |

Asian | 9 (18) | 17 (19) | |

Black | 13 (25) | 2 1 (24) | |

White | 13 (25) | 26 (30) | |

Other | 16 (31) | 24 (27) | |

Comorbidity, n (%) | | | |

Cardiovascular | 4 (8) | 16 (18) | |

Respiratory | 6 (12) | 6 (7) | |

Hypertension | 25 (49) | 38 (43) | |

Diabetes mellitus | 14 (27) | 36 (41) | |

Clinical frailty scale <5, n (%) | 48 (94) | 77 (88) | p=0.21 (chi-squared test) |

Admission creatinine, μmol/L | 103 | 131 | p=0.02 (T test) |

Admission C-reactive protein, mg/L | 154 | 162 | p=0.67 (T test) |

Highest FiO_{2} required | 0.69 | 0.83 | p<0.001 (T test) |

Highest PEEP required, cmH_{2}O | 10.1 | 10.8 | p=0.13 (T test) |