Table 1.
Demographic and baseline characteristics among patients with dyspnoeic and silent hypoxia
| Total | Dyspnoeic hypoxia n (col%) | non-dyspnoeic (silent) hypoxia | P | |
|---|---|---|---|---|
| Age (n=811) | ||||
| <18 years | 207 (25.52%) | 164 (25.75%) | 43 (24.71%) | 0.366 |
| 45-60 years | 341 (42.05%) | 274 (43.01%) | 67 (38.51%) | |
| >60 years | 263 (32.43%) | 199 (31.24%) | 64 (36.78%) | |
| Sex (n=811) | ||||
| Female | 269 (33.17%) | 198 (31.08%) | 71 (40.8%) | 0.016 |
| Male | 542 (66.83%) | 439 (68.92%) | 103 (59.2%) | |
| Primary Condition (n=811) | ||||
| Non-COVID | 20 (2.47%) | 12 (1.88%) | 8 (4.6%) | 0.041 |
| COVID | 791 (97.53%) | 625 (98.12%) | 166 (95.4%) | |
| Vaccination (n=791) | ||||
| No | 604 (76.36%) | 472 (76.01%) | 132 (77.65%) | 0.656 |
| Yes | 187 (23.64%) | 149 (23.99%) | 38 (22.35%) | |
| Comorbidities (n=810) | ||||
| 0 | 364 (44.94%) | 297 (46.7%) | 67 (38.51%) | 0.129 |
| 1 | 264 (32.59%) | 198 (31.13%) | 66 (37.93%) | |
| 2 or more | 182 (22.47%) | 141 (22.17%) | 41 (23.56%) | |
| Hypertension (n=810) | ||||
| Yes | 238 (29.38%) | 188 (29.56%) | 50 (28.74%) | 0.833 |
| Diabetes (n=810) | ||||
| Yes | 223 (27.53%) | 176 (27.67%) | 47 (27.01%) | 0.863 |
| Symptomatic (n=810) | ||||
| No | 9 (1.11%) | 0 (0%) | 9 (5.2%) | <0.001 |
| Yes | 801 (98.89%) | 637 (100%) | 164 (94.8%) | |
| Symptom to admission weeks (n=774) | ||||
| 1 | 431 (55.68%) | 323 (53.13%) | 108 (65.06%) | <0.001 |
| 2 | 324 (41.86%) | 275 (45.23%) | 49 (29.52%) | |
| 3 | 10 (1.29%) | 10 (1.64%) | 0 (0%) | |
| Asymptomatic | 9 (1.16%) | 0 (0%) | 9 (5.42%) | |
| Presenting Symptoms (n=811) | ||||
| Fever | ||||
| Yes | 649 (80.02%) | 521 (81.79%) | 128 (73.56%) | 0.016 |
| Dry Cough | ||||
| Yes | 447 (55.12%) | 344 (54%) | 103 (59.2%) | 0.222 |
| Cough with Expectoration | ||||
| Yes | 103 (12.7%) | 77 (12.09%) | 26 (14.94%) | 0.316 |
| Rhinitis | ||||
| Yes | 11 (1.36%) | 8 (1.26%) | 3 (1.72%) | 0.71 |
| Sore throat | ||||
| Yes | 115 (14.18%) | 90 (14.13%) | 25 (14.37%) | 0.936 |
| Fatigue | ||||
| Yes | 103 (12.7%) | 78 (12.24%) | 25 (14.37%) | 0.456 |
| Myalgia | ||||
| Yes | 115 (14.18%) | 83 (13.03%) | 32 (18.39%) | 0.072 |
| Chest pain | ||||
| Yes | 55 (6.78%) | 42 (6.59%) | 13 (7.47%) | 0.683 |
| Gastrointestinal | ||||
| Yes | 58 (7.15%) | 38 (5.97%) | 20 (11.49%) | 0.012 |
| Drowsiness | ||||
| Yes | 7 (0.86%) | 4 (0.63%) | 3 (1.72%) | 0.173 |
| Loss of smell | ||||
| Yes | 49 (6.04%) | 37 (5.81%) | 12 (6.9%) | 0 |
| Loss of taste | ||||
| Yes | 45 (5.55%) | 37 (5.81%) | 8 (4.6%) | 0.536 |
| Oxygen status at Presentation (n=811) | ||||
| Room Air | 432 (53.27%) | 318 (49.92%) | 114 (65.52%) | <0.001 |
| On Oxygen | 379 (46.73%) | 319 (50.08%) | 60 (34.48%) |