|   
  |       HBs Ag positive women  |       HBs Ag negative women  |       Odds ratio  |       P  |    ||
|   
  |       Number (n)  |       Percentage (%)  |       Number (n)  |       Percentage (%)  |       
  |    |
|   History of surgery  |       3  |       21.4  |       10  |       9.9  |       2.48  |       0.21  |    
|   History of blood transfusion  |       0  |       0  |       1  |       0.09  |       1.28  |       0.61  |    
|   Tattoos  |       3  |       21.4  |       28  |       27.7  |       0.71  |       0.62  |    
|   Scarifications  |       0  |       0  |       8  |       7.9  |       0.37  |       0.5  |    
|   Total of women tested  |       14  |       100  |       101  |       100  |       
  |       
  |