Table 1.
Characteristics of the study sample for selected variables, Mexico 2023.
| Characteristic | Severe COVID-19 | ||
|---|---|---|---|
| No | Yes | ||
| Gender | |||
| Female | 390 (63.7) | 14 (41.2) | 0.008 |
| Male | 222 (36.3) | 20 (58.8) | |
| Age (years, median and IQR) | 43 (28–58) | 68 (59–76) | <0.001 |
| COVID-19 vaccination status | |||
| Not vaccinated | 507 (82.8) | 21 (61.8) | <0.001 |
| One dose | 19 (3.1) | 0 (0) | |
| Two doses | 62 (10.1) | 5 (14.7) | |
| Three doses | 24 (3.9) | 8 (23.5) | |
| Personal history of: | |||
| Smoking (current), yes | 21 (3.4) | 4 (11.8) | 0.014 |
| Obesity (BMI ≥ 30), yes | 69 (11.3) | 7 (20.6) | 0.101 |
| Asthma, yes | 10 (1.6) | 1 (2.9) | 0.566 |
| COPD, yes | 11 (1.8) | 6 (17.7) | <0.001 |
| Type 2 diabetes mellitus, yes | 81 (13.2) | 13 (38.2) | <0.001 |
| Cardiovascular disease, yes | 9 (1.5) | 5 (14.7) | <0.001 |
| CKD, yes | 17 (2.8) | 5 (14.7) | <0.001 |
| Immunosuppression (any cause), yes | 9 (1.5) | 3 (8.8) | 0.002 |
Abbreviations: COVID-19, coronavirus disease 2019; IQR, interquartilic range; BMI, body mass index; COPD, chronic pulmonary obstructive disease; CKD, chronic kidney disease. Notes: (1) The absolute frequencies () and relative frequencies (%) are presented unless specified as the median; (2) The p-values from chi-squared or U-test are reported accordingly.