Table 4 Final Logistic regression model for predicting presence or absence of aesthetically significant fluorosis (TF3+), including the clustering of the children in 11 schools

Drinking water (ppm):

0.019

0.20 to 0.59

1.35 (0.60)

0.50

(0.66, 2.33)

0.60 to 0.89

1.61 (0.64)

0.23

(0.61, 3.66)

0.9+

3.34 (1.22)

0.001

(1.52, 7.04)

Cooking water (ppm):

<0.001

0.20 to 0.59

1.21 (0.74)

0.75

(0.37, 4.03)

0.60 to 0.89

1.85 (0.94)

0.22

(0.69, 5.01)

0.90 to 1.59

1.85 (1.07)

0.29

(0.59, 5.77)

1.6+

5.54 (3.01)

0.002

(1.91, 16.04)