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Table 5 Comparisons of changes in samples over time between the two groups

From: Evaluation of the antibacterial effect of titanium dioxide nanoparticles combined with acrylic laminates for functional orthodontic appliances: a randomized controlled clinical trial

Change

Test Group

Control group

HLE

Z value

P value

Baseline minus one-month

0

-90,000 to 0

-90,000

-92,250 to 0

9900

-1.656

0.143

Baseline minus two months

49,500

-22,500 to 90,000

-9000

-90,000 to 0

90,000

-1.966

0.052

Baseline minus four months

90,000

6750 to 92,250

-49,500

-90,000 to 0

99,000

-3.608

< 0.001

Baseline minus six months

90,000

0 to 99,000

-90,000

-92,250 to -675

99,900

-3.453

< 0.001

  1. Notes: Data are median, and Q1 to Q3. HLE = Hodges-Lehman estimator of median difference. The test of significance is Mann‒Whitney U test