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Table 5 Distribution of burning sensation, pain on opening according to groups in different time periods

From: Effectiveness of Pentoxifylline in the treatment of oral submucous fibrosis patients: a case-control study

SYMPTOMS GroupNMean RankSum of RanksU valueP value
BURNING SENSATIONBaselinePentoxyfylline4033.971087.00  
Placebo4031.03993.000.6410.521
Total80    
1st MonthPentoxyfylline4030.34971.00  
Placebo4034.661109.000.9550.340
Total80    
2nd MonthPentoxyfylline4027.98895.50  
Placebo4037.021184.502.0730.038*
Total80    
3rd MonthPentoxyfylline4026.94862.00  
Placebo4038.061218.002.6730.008*
Total80    
BaselinePentoxyfylline4029.78953.00  
Placebo4035.221127.001.1800.238
PAIN ON OPENING THE MOUTHTotal80    
1st MonthPentoxyfylline4027.73887.50  
Placebo4037.271192.502.1030.035*
Total80    
2nd MonthPentoxyfylline4023.58754.50  
Placebo4041.421325.503.927< 0.0001*
Total80    
3rd MonthPentoxyfylline4022.66725.00  
Placebo4042.341355.004.320< 0.0001*
Total80    
  1. The symbol *states that the P value for that group was statistically significant