|  | Control Group | Intervention Groups | Test applied | 
   
  | Parameters studied : | Group C ( Mean ± SD)
 | Group A ( Mean ± SD)
 | Group B ( Mean ± SD)
 | ANOVA | 
   
  | Study duration of labour   (hrs.) 1st stage
 | 2.76±0.34 | 2.80±0.35 | 2.87±0.36 | f- value= 0.759 p-value=0.471
 | 
   
  | 2nd stage | 1.26±0.26 | 1.24±0.24 | 1.32±0.32 | f- value= 0.685 p-value=0.507
 | 
   
  | Total dose Bupivacaine(mg) | 76.24±12.34 | 67.42±20.25 | 53.20±18.15 | f- value= 13.639 p-value<0.0001
 | 
   
  | Total dose Fentanyl(mcg) | N.A. | 74.34±30.34 | 65.12±25.65 | T – value=2.59 p-value=0.03
 | 
   
  | No. of top-ups | 3.12±1.23 | 2.48±1.29 | 1.82±1.35 | f- value= 7.606 p-value=0.001
 | 
   
  | Duration of Action (1st top up requirement)
 | 75±12.24 min | 100±10.04 min | 120±20.26 min | f- value= 69.20 p-value<0.0001
 |