Table 2.
Baseline characteristics of study patients aged ≥ 60 years.
| Variables | Overall (n = 4053) | BMI categories (kg / m2) | p-value* | |||
|---|---|---|---|---|---|---|
| < 18.5 (n = 47) | 18.5–29.9 (n = 2594) | 30.0–39.9 (n = 1264) | ≥ 40.0 (n = 148) | |||
| Age (years) | 72.0 (13.0) | 81.0 (15.0) | 73.0 (15.0) | 69.0 (11.0) | 68.0 (8.5) | < 0.001 |
| Sex | < 0.001 | |||||
| Men | 2282 (56.3) | 23 (1.0) | 1567 (68.7) | 641 (28.1) | 51 (2.2) | |
| Women | 1771 (43.7) | 24 (1.4) | 1027 (58.0) | 623 (35.2) | 97 (5.5) | |
| Hypertensionª | 2937 (77.9) | 30 (1.0) | 1781 (60.6) | 995 (33.9) | 131 (4.5) | < 0.001 |
| Diabetes mellitusª | 1838 (48.7) | 17 (0.9) | 1093 (59.5) | 639 (34.8) | 89 (4.8) | < 0.001 |
| Smokingª | 192 (5.1) | 2 (1.0) | 127 (66.2) | 57 (29.7) | 6 (3.1) | 0.80 |
| Chronic kidney diseaseª | 408 (10.8) | 9 (2.2) | 278 (68.1) | 110 (27.0) | 11 (2.7) | 0.01 |
| Myocardial infarctionª | 230 (6.1) | 4 (1.7) | 158 (68.7) | 64 (27.8) | 4 (1.7) | 0.11 |
| Previous strokeª | 222 (5.9) | 4 (1.8) | 177 (79.7) | 37 (16.7) | 4 (1.8) | < 0.001 |
| Dementiaª | 291 (7.7) | 17 (5.8) | 228 (78.4) | 40 (13.8) | 6 (2.1) | < 0.001 |
| Atrial fibrillationª | 175 (4.7) | 3 (1.7) | 126 (72.0) | 39 (22.3) | 7 (4.0) | 0.04 |
| Hospital mortality§ | 1738 (43.9) | 22 (1.3) | 1146 (65.9) | 500 (28.8) | 70 (4.0) | 0.02 |
| ICU length of stay¥ | 8.8 (12.6) | 4.7 (10.1) | 8.4 (12.2) | 9.6 (13.2) | 9.1 (12.8) | < 0.001 |
For the variables age and ICU length of stay, data are median (IQR).
ªThe variables hypertension, diabetes mellitus, smoking, chronic kidney disease, previous myocardial infarction, previous stroke, dementia, and atrial fibrillation have 282 missing data.
*Kruskal–Wallis test for continuous and Chi-squared test for categorical variables.
§The variable hospital mortality presented 91 missing data.
¥The variable ICU length of stay presented 19 missing data.