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Table 1 Demographic and clinical characteristics of the population

From: Prevalence and associated characteristics of anti-SARS-CoV-2 antibodies in Mexico 5 months after pandemic arrival

  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)  
  1. aMedian (IQR). IgG Type G immunoglobulin, IgM Type M immunoglobulin