Times (Days) Tested drugs groups Who grading P Value
0 N (%) 1 N (%) 2 N (%) 3 N (%) 4 N (%)
1 BenzydamineHCl 48(55.2) 4(23.5) 2(50.0)     0.051
Placebo 39(44.8) 13(76.5) 2(50.0)    
BenzydamineHCl 48(50.5) 4(40.0) 2(66.7)     0.692
Olive leaf 47(49.5) 6(60.0) 1(33.3)    
Olive leaf 47(54.7) 6(31.6) 1(33.3)     0.161
Placebo 39(45.3) 13(68.4) 2(66.7)    
8 BenzydamineHCl 33(80.5) 9(75.0) 8(26.7) 4(19.0) 0(0.0) 0.000
Placebo 8(19.5) 3(25.0) 22(73.3) 17(81.0) 4(100.0)
BenzydamineHCl 33(42.9) 9(52.9) 8(80.0) 4(100.0)   0.026
Olive leaf 44(57.1) 8(47.1) 2(20.0) 0(0.0)  
Olive leaf 44(84.6) 8(72.7) 2(8.3) 0(0.0) 0(0.0) 0.00
Placebo 8(15.4) 3(27.3) 22(91.7) 17(100.0) 4(100.0)
15 BenzydamineHCl 41(82.0) 9(28.1) 4(20.0) 0(0.0)   0.000
Placebo 9(18.0) 23(71.9) 16(80.0) 6(100.0)  
BenzydamineHCl 41(45.1) 9(75.0) 4(80.0)     0.053
Olive leaf 50(54.9) 3(25.0) 1(20.0)    
Olive leaf 50(84.7) 3(11.5) 1(5.9) 0(0.0)   0.000
Placebo 9(15.3) 23(88.5) 16(94.1) 6(100.0)  
The bold font shows the significant P value
Table 6: The WHO grades for the tested drugs by using Kruskall-Wallis test.