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Table 1 Demographic characteristics of study participants (n = 776)

From: The healthy behaviours and COVID-19 mortality among Iranian women: a case–control study

  Case (n = 261) Control (n = 515) Total
Frequency % Frequency % chi2 p value
Age categories
 < 10 17 6.5 2 0.4 228.24  < 0.001
10–19 3 1.1 21 4.1   
20–29 9 3.4 53 10.4   
30–39 20 7.7 119 23.0   
40–49 23 8.8 148 28.6   
50–59 44 16.9 97 19.0   
60–69 58 22.2 54 10.6   
70–79 57 21.8 20 3.9   
 > 80 30 11.5 2 0.4   
NCDs
Chronic disease 167 64.0 41 7.9 278.2  < 0.001
Diabetes 94 36.01 65 12.6 58.2  < 0.001
CVDs 120 46.1 32 6.2 174.4  < 0.001
Obese 106 40.6 24 4.6 161.2  < 0.001
Metabolic disease 7 2.7 2 0.4 7.99 0.005
Lung disease 25 9.6 26 5.0 5.86 0.015
Smoking
Yes 2 0.8 5 1.0 0.078 0.715
No 259 99.2 512 99.0   
BMI categorized
Underweight 17 6.5 14 2.7 13.28 0.004
Normal weight 42 16.1 128 24.8   
Overweight 117 44.8 227 44.0   
Obesity 85 32.6 147 28.5   
  1. n, number; NCDs, non-communicable diseases; CVDs, cardiovascular diseases; BMI, Body Mass Index