This study was done to describe the association between source of drinking water and other potential risk factors with @entity3296 . Prevalence of @entity3296 among 518 14-year-old students in the south of @entity3595 Lanka was 43.2%. The drinking water sources of the students were described and @entity1388 samples were taken. There was a strong association between water @entity1388 level and prevalence of @entity3296 . Tea drinking before 7 years of age was also an independent risk factor in a multivariate analysis. Having been fed with formula bottle milk as an @entity1 seemed to increase the risk although the effect was not statistically significant. No clear effects could be found for using fluoridated toothpaste, occupation of the father, and socio-economic status. Drinking water obtained from surface water sources had lower @entity1388 levels (median 0.22 mg l(-1)) than water from deep tube wells (median 0.80 mg l(-1)). Most families used shallow dug wells and these had a median @entity1388 value of 0.48 mg l(-1) but with a wide range from 0.09 to 5.90 mg l(-1). Shallow wells located close to irrigation canals or other surface water had lower @entity1388 values than wells located further away. @entity1388 levels have to be taken into account when planning drinking water projects. From the point of view of prevention of @entity3296 , drinking water from surface sources or from shallow wells located close to surface water would be preferable.

Source of drinking water and other risk factors for @entity3296 in XXXX Lanka.

@entity3296 :: ('MESH:D009050', 'Disease') :: ['dental fluorosis', 'fluorosis'] @entity1 :: ('9606', 'Species') :: ['infant'] @entity3595 :: ('6717', 'Gene') :: ['Sri'] @entity1388 :: ('MESH:D005459', 'Chemical') :: ['fluoride', 'Fluoride']
@entity3595 :: (6717,Gene) :: ['Sri']
