Skip to main content

Table 2 Longitudinal changes of 12 to 18 years old

From: A cohort study of factors that influence oral health-related quality of life from age 12 to 18 in Hong Kong

 

12 years old

15 years old

18 years old

 

Mean (SD)

Median (IQR)

Mean (SD)

Median (IQR)

Mean (SD)

Median (IQR)

P value

OHRQoL

2.18(1.093)

2.00(2)

2.47(1.125)

2.00(3)

2.27(1.195)

2.00(2)

0.005**

IOTN (DHC)

1.65(0.829)

1.00(1)

1.71(0.824)

1.00(1)

1.69(0.822)

1.00(1)

0.375

IOTN (AC)

1.23(0.555)

1.00(0)

1.26(0.577)

1.00(0)

1.27(0.590)

1.00(0)

0.013*

DAI

1.65(0.880)

1.00(1)

1.95(1.004)

2.00(2)

1.93(0.987)

2.00(2)

0.000**

ICON

1.31(0.465)

1.00(1)

1.33(0.471)

1.00(1)

1.34(0.473)

1.00(1)

0.582

ICON complexity

2.03(0.961)

2.00(1)

2.05(1.015)

2.00(1)

2.07(1.029)

2.00(1)

0.386

PAR

2.14(0.706)

2.00(1)

2.27(0.790)

2.00(1)

2.27(0.798)

2.00(1)

0.000**

  1. OHRQoL Oral Health-Related Quality of Life, IOTN Index of Orthodontic Treatment Need, DHC dental health component, AC aesthetic component, DAI dental aesthetic index, ICON Index of Complexity, Outcome and Need, PAR Peer Assessment Rating, SD standard deviation, IQR interquartile range; **: p < 0.01; *: p < 0.05
  2. Sample size: 188; Statistical method: Friedman’s 2-way ANOVA by ranks (k samples): all pairwise multiple comparisons. OHRQoL were classified into quartiles; IOTN (DHC) and IOTN (AC): no need, borderline need, definite need; DAI: normal or minor malocclusion, definite malocclusion, severe malocclusion, very severe (handicapping) malocclusion; ICON: no, yes; ICON complexity: easy, mild, moderate, difficult, very difficult; PAR: almost ideal occlusion, acceptable occlusion, malocclusion