Table 3

Validity Assessment (Score out of 8)

Author

Prospective

Study

Fluoride

Confounding

Control for

Blinding

Baseline

Follow-

Score

Design

Measurement

Factors

Confounding

Survey

Up


Erickson (1976)

0

1/2

0

1

1

0

0

1

3.5

Erickson (1980)

0

1/2

0

1

1

0

0

1

3.5

Needleman (1974)

0

1/2

0

1/4

0

0

0

1

1.8

Rapaport (1963)

0

1/2

0

1/4

0

0

0

1

1.8

Rapaport (1957)

0

1/2

0

1/4

0

0

0

1

1.8

Berry (1958)

0

1/2

0

0

0

0

0

1

1.5


Whiting et al. BMC Public Health 2001 1:6   doi:10.1186/1471-2458-1-6

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