Duration of Observation 
SubstanceP Level (pg/ml) 
P value 
Pregabalin Group (n=26) 
Control Group (n=26) 
Min–Max 
Median 
MinMax 
Median 
Before Surgery 
11185 
48.5 
6154 
60.5 
p=0.510 
1hr After Surgery 
2.3173.5 
19.3 
23.6205.6 
59.6 
p=0.000^{*} 

Data are shown in minimal, maximal and mean value, deviation standard
and probability were tested with Mann WhitneyU test, p<0.05 is significant. ^{*}P
value<0.05. 
Table 3: SubstanceP level alteration between two groups. 