Table 2 Bivariate analysis comparing the OHIP-14 dimensions and the total score of OHIP-14 between wearers of orthodontic aligners (G1) and wearers of conventional fixed appliance (G2)

Functional limitation

1.00 (0–5)

1.06 (1.36)

1.00 (0–5)

0.89 (1.16)

0.745

0.168

(-0.490–0.825)

0.13

(-0.38–0.64)

0.635

Physical

pain

3.00 (0–5)

2.73 (1.56)

4.00 (0–7)

4.04 (1.73)

0.004

-1.308

(-2.154 - -0.463)

0.74

(0.23–1.25)

0.879

Psychological discomfort

2.00 (0–8)

2.58 (2.43)

3.00 (0–7)

3.18 (2.03)

0.212

-0.603

(-1.766–0.561)

0.26

(-0.25–0.77)

1.132

Physical disability

0.00 (0–6)

0.85 (1.37)

1.00 (0–7)

1.75 (2.06)

0.058

-0.902

(-1.823–0.020)

0.50

(-0.01–1.01)

0.884

Psychological disability

1.00 (0–8)

1.61 (1.88)

2.50 (0–8)

2.50 (2.15)

0.076

-0.894

(-1.928–0.141)

0.43

(-0.08–0.94)

1.022

Social disability

0.00 (0–5)

0.64 (1.14)

1.00 (0–6)

1.18 (1.51)

0.080

-0.542

(-1.224–0.140)

0.40

(-0.11–0.91)

0.671

Handicap

0.00 (0–8)

0.76 (1.54)

0.00 (0–4)

0.64 (1.31)

0.494

0.115

(-0.626–0.856)

0.08

(-0.43–0.59)

0.715

Total score

9.00 (0–39)

10.21 (8.50)

12.00 (0–38)

14.18 (8.01)

0.023

-3.966

(-8.225 - -0.292)

0.46

(-0.05–0.97)

4.452