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Table 2 Descriptive analysis: for all participants, by city and for the lowest and highest quintiles of deprivation

From: Adolescents' perceptions of the aesthetic impact of dental fluorosis vs. other dental conditions in areas with and without water fluoridation

 

Image letter (Figure 1)

City: mean rankings

  

Newcastle (N = 741) Fluoridated

Manchester (N = 812) Non-fluoridated

Total (1553)

Independent Samples t-test (between cities)

     

P value

95% CI

  

Mean (S.D.)

Mean (S.D.)

Mean (S.D.)

  

Very White Teeth

a

1.07 (0.452)

1.07 (0.536)

1.07 (0.497)

0.948

(-0.048, 0.051)

Vita shade A1

b

2.32 (0.945)

2.34 (1.031)

2.33 (0.991)

0.678

(-0.120, 0.078)

Fluorosis TF1

c

4.17 (1.529)

4.47 (1.618)

4.33 (1.583)

< 0.001*

(- 0.451, - 0.137)

Medium demarcated opacity

g

4.55 (1.547)

4.48 (1.665)

4.51 (1.61)

0.406

(-0.092, 0.228)

Fluorosis TF2

d

5.22 (1.620)

5.54 (1.678)

5.39 (1.658)

< 0.001*

(- 0.485, - 0.156)

Vita A1 chipped incisal edge

i

5.75 (2.28)

5.43 (2.285)

5.59 (2.287)

< 0.005*

(0.01, 0.554)

Fluorosis TF3

e

6.63 (1.512)

6.81 (1.504)

6.72 (1.51)

0.018

(-0.332, -0.032)

Fluorosis TF4

f

7.92 (1.453)

7.99 (1.639)

7.95 (1.553)

0.374

(-0.225, 0.085)

Large demarcated opacity

h

8.58 (1.395)

8.47 (1.523)

8.52 (1.464)

0.132

(-0.034, 0.258)

Teeth with Caries

j

8.79 (1.614)

8.41 (1.901)

8.59 (1.78)

< 0.001*

( 0.203, 0.556)

 

Image letter (Fig 1)

Deprivation: mean rankings

  

Lowest Quartile Deprivation

(n = 308)

Highest Quartile Deprivation

(n = 325)

Independent Samples t-test (between deprivation quartiles)

  

Mean (S.D.)

Mean (S.D.)

P value

95% CI

Very White Teeth

a

1.10 (0.689)

1.09 (0.612)

0.931

(-0.081, 0.089)

Vita shade A1

b

2.38 (1.089)

2.40 (1.006)

0.403

(-0.210, 0.085)

Fluorosis TF1

c

4.23 (1.556)

4.37 (1.640)

0.379

(-0.334, 0.127)

Medium demarcated opacity

g

4.21 (1.514)

4.62 (1.705)

0.001*

(- 0.633, - 0.158)

Fluorosis TF2

d

5.55 (1.557)

5.36 (1.733)

0.131

(-0.55, 0.419)

Vita A1 chipped incisal edge

i

5.92 (2.365)

5.30 (2.223)

0.001*

(0.253, 0.969)

Fluorosis TF3

e

6.60 (1.497)

6.77 (1.511)

0.154

(0.369, 0.058)

Fluorosis TF4

f

8.02 (1.486)

7.99 (1.476)

0.191

(-0.069, 0.348)

Large demarcated opacity

h

8.38 (1.513)

8.63 (1.484)

0.072

(-0.405, 0.017)

Teeth with Caries

j

8.61 (1.836)

8.46 (1.855)

0.447

(-0.158, 0.359)

  1. Rankings for images based from 1 to 10, with 1 rated best.