Table 3 Vita® Shade Tooth Assessment (Intent-To-Treat Subjects)

N

78

70

60

59

52

50

Baseline

Mean

10.8

10.0

10.8

10.1

10.9

10.1

S.D.

3.2

3.2

3.15

3.23

3.15

3.18

Median

11.8

10.3

11.8

10.5

11.8

10.5

Min,Max

(2.0,15.0)

(3.0,15.0)

(2.5,15.0)

(3.0,15.0)

(2.5,15.0)

(3.0,15.0)

Post

Mean

10.9

10.0

11.1

10.1

11.4

10.1

S.D.

3.1

3.2

3.1

3.2

3.2

3.2

Median

12.0

10.1

12.0

10.5

12.0

10.8

Min,Max

(2.0,15.0)

(3.0,15.0)

(2.0,15.0)

(3.0,15.0)

(2.0,15.0)

(2.0,15.0)

Change

Mean

0.16

-0.03

0.28

-0.06

0.50

0.00

S.D.

0.70

0.17

0.94

0.55

1.16

0.64

Median

0.00

0.00

0.00

0.00

0.00

0.00

Min,Max

(-1.00,4.00)

(-1.00,0.50)

(-1.00,4.00)

(-2.00,1.00)

(-1.00,4.00)

(-2.00,2.00)

Paired t-test

p-value

0.047

0.159

0.023

0.411

0.003

>0.999

LsMean

0.17

-0.04

0.25

-0.11

0.44

-0.12

s.e.

0.06

0.06

0.10

0.10

0.13

0.14

p-value

0.015^a

0.011^a

0.003^a

Difference

0.21

0.36

0.56

s.e.

0.09

0.14

0.18

95% C.I.

[0.04,0.38]

[0.09,0.64]

[0.19,0.92]