Table 2: Visual Analogue Scale (VAS) scores of 26 pairs of teeth expressed in median, lower (25% percentile) and upper (75% percentile) before and after treatment with ozone (test) and air (control) at baseline and at follow up after three months (V1).

VAS Median 25e percentile 75e percentile
Baseline Before ozone treatment 6.00 3.00 7.00
After ozone treatment 2.00 1.00 5.00
Before air treatment 4.50 2.75 7.00
After air treatment 2.00 0.75 4.00
V1 Before ozone treatment 4.00 2.00 6.125
After ozone treatment 2.00 0.75 3.50
Before air treatment 3.00 2.00 5.00
After air treatment 2.25 0.75 4.00