Table 1.
Demographic and clinical characteristics of the population
| Total sample (n = 3268) | Negative IgM/IgG (n = 3075) | Positive IgM/IgG (n = 193) | P | |
|---|---|---|---|---|
| Males, n (%) | 2008 (61.4) | 1891 (61.5) | 117 (60.6) | 0.82 |
| Age, yrs | 0.29 | |||
| 18–34, n (%) | 1127 (34.5) | 1059 (34.5) | 68 (35.2) | |
| 35–49, n (%) | 1328 (40.6) | 1242 (40.4) | 86 (44.6) | |
| 50–65, n (%) | 765 (23.4) | 730 (23.7) | 35 (18.1) | |
| > 65, n (%) | 48 (1.5) | 44 (1.4) | 4 (2.1) | |
| Weighta, kg | 80.0 (69–90) | 80.0 (69–90) | 82 (72–92) | 0.13 |
| Heighta, m | 1.67 (1.6–1.7) | 1.67 (1.6–1.7) | 1.67 (1.6–1.7) | 0.86 |
| BMIa, kg/m2 | 28.41 (25.3–32) | 28.4 (25.2–32) | 29.0 (25.6–32.6) | 0.18 |
| BMI categories | 0.08 | |||
| Underweight, n (%) | 17 (0.5) | 17 (0.6) | 0 | |
| Normal, n (%) | 721 (22.1) | 685 (22.3) | 36 (18.7) | |
| Overweight, n (%) | 1289 (39.4) | 1209 (39.3) | 80 (41.5) | |
| Obesity I-III, n (%) | 1241 (38) | 1164 (37.8) | 77 (39.8) | |
| Comorbidities | ||||
| Hypertension, n (%) | 287 (8.8) | 269 (8.7) | 18 (9.3) | 0.79 |
| Diabetes type 2, n (%) | 287 (8.8) | 273 (8.9) | 14 (7.3) | 0.51 |
| Obesity, n (%) | 1241 (38) | 1164 (37.8) | 77 (39.8) | 0.59 |
| City | 0.08 | |||
| Guadalupe, n (%) | 1970 (60.3) | 1846 (60.0) | 124 (64.2) | |
| Monterrey, n (%) | 495 (15.1) | 257 (8.4) | 17 (8.8) | |
| Juárez, n (%) | 274 (8.4) | 465 (15.1) | 30 (15.5) | |
| Other, n (%) | 530 (16.2) | 507 (16.5) | 22 (11.5) | |
| Occupation | 0.09 | |||
| Police, firefighters and public safety, n (%) | 1051 (32.2) | 982 (31.9) | 69 (35.7) | |
| Office/Management, n (%) | 696 (21.2) | 660 (21.5) | 36 (18.7) | |
| Maintainance/Janitors, n (%) | 608 (18.7) | 583 (18.9) | 25 (12.9) | |
| Healt-care workers, n (%) | 163 (5) | 155 (5) | 8 (4.1) | |
| Other, n (%) | 750 (22.9) | 695 (22.7) | 55 (28.6) | |
aMedian (IQR). IgG Type G immunoglobulin, IgM Type M immunoglobulin