|   Group  |       Cases  |       Pre-OP  |       Post-OP  |       Post-OP (1 d)  |       Post-OP (3 d)  |       Post-OP (30 d)  |       Post-OP (90 d)  |    
|   A  |       30  |       8.24 ± 1.37  |       3.01 ± 1.06  |       2.83 ± 0.87  |       2.04 ± 0.46  |       1.05 ± 0.54  |       0.78 ± 0.67  |    
|   B  |       30  |       7.98 ± 1.25  |       2.13 ± 0.84  |       1.75 ± 0.68  |       1.07 ± 0.24  |       1.00 ± 0.47  |       0.69 ± 0.45  |    
|   P Value  |       
  |       0.4457  |       0.007  |       <0.0001  |       <0.0001  |       0.7035  |       0.5437  |