Table 2.

Differences of dental pain and the need for root canal treatment between ozone and traditional treatment groups (n = 84, 42 participants for each group).

Statistics	Tooth pain at baseline	Tooth pain after 24 h	Need for RCT
MW-U	758.0	28.5	735.0
Z	− 1.187	− 7.787	− 2.455
P	.235	< .0001	.014

MW-U = Mann Whitney U test coefficient, Z = Z statistic, P = Two tailed probability, RCT = Root canal treatment.