Table 1.
Classification of first 20 results based on Internet searches for "water fluoridation" and "water fluoridation dangers" using five major search engines
| "water fluoridation" | "water fluoridation dangers" | |||||||
| Search engine | For | Against | Reviews | Other | For | Against | Reviews | Other |
| 7 | 9 | 3 | 1 | 0 | 20 | 0 | 0 | |
| Yahoo | 5 | 11 | 1 | 3 | 0 | 19 | 0 | 1 |
| MSN | 8 | 10 | 1 | 1 | 1 | 18 | 0 | 1 |
| AOL | 6 | 9 | 3 | 2 | 0 | 20 | 0 | 0 |
| Ask | 3 | 16 | 1 | 0 | 0 | 20 | 0 | 0 |
Note: Search conducted on 10 April 2006, from Australia. Listed search engines account for 90.3% of all US Internet searches (AC Nielson, 2005)