Skip to main content

Table 4 Comparisons between the two groups at each time point

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

Time point

Test Group

Control group

HLE

Z value

P value

At baseline

100,000

(100,000–100,000)

10,000

(1000–10,000)

90,000

-2.195

0.043

After 1-month

100,000

(1,000,000 − 100,000)

100,000

(77,500–100,000)

0.000

-0.669

0.684

After 2-months

10,000

(7750-100000)

10,000

(10,000–100,000)

0.000

0.935

0.436

After 4-months

5500

(775-10000)

100,000

(10,000–100,000)

-90,000

2.865

0.005

After 6-months

10,000

(1000–10,000)

100,000

(77,500–100,000)

-90,000

3.170

0.002

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