|   Variables  |       Mean (SD)  |       1  |       2  |       3  |    
|   1) Perceived stress at baseline  |       11.9 (4.10)  |       
  |       
  |       
  |    
|   2) Perceived stress after 2 weeks  |       10.9 (4.15)  |       0.65**  |       
  |       
  |    
|   3) Neck meridian test at baseline  |       4.4 (3.00)  |       0.29*  |       0.24  |       
  |    
|   4) Neck meridian test at 2 weeks  |       4.4 (3.27)  |       0.17  |       0.39**  |       0.82**  |