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Table 3 Comparison of oral mucositis at different time points between groups

From: Effectiveness of zinc chloride mouthwashes on oral mucositis and weight of patients with cancer undergoing chemotherapy

Groups 1 week after intervention
Mean rank
2 weeks after intervention
Mean rank
3 weeks after intervention
Mean rank
p value
Zinc chloride group 0.02 0.52 1.01 0.41*
placebo group 0.42 2.76 3.57 0.027*
p value 0.026** 0.002** 0.001**  
  1. *Friedman’s test was used for comparison within groups (significant p < 0.05)
  2. **Mann–Whitney U test was used for comparison between groups (significant p < 0.0025)