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Table 3 Comparisons between the time points in each group

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

χ2 [4]

P value

Control group

χ2 [4]

P value

At baseline

100,000

(100,000–100,000)

23.234

< 0.001

10,000

(1000–10,000)

15.465

0.004

After 1-month

100,000

(1,000,000 − 100,000)

100,000

(77,500–100,000)

After 2-months

10,000

(7750-100000)

10,000

(10,000–100,000)

After 4-months

5500

(775-10000)

100,000

(10,000–100,000)

After 6-months

10,000

(1000–10,000)

100,000

(77,500–100,000)

  1. Notes: Data are median (Q1-Q3). The test of significance is the Friedman test