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. Author manuscript; available in PMC: 2021 Feb 23.
Published in final edited form as: J Public Health Dent. 2017 Dec 29;78(2):165–174. doi: 10.1111/jphd.12260

Table 4:

Fluorosis prevalence* by 2-5 year and 5-8 year fluoride intake levels**

Age 2-5 Tertiles Canines 1st Premolar
Age 5-8 Tertiles Total Age 5-8 Tertiles Total
Low Moderate High Low Moderate High
Low 5/55
(9.1%)		 1/20
(5.0%)		 2/8
(25.0%)		 8/83
(9.6%)		 10/60
(16.7)		 2/23
(8.7%)		 1/8
(12.5%)		 13/91
(14.3%)
Moderate 2/23
(8.7%)		 8/47
(17.0%)		 5/23
(21.7%)		 15/93
(16.1%)		 4/27
(14.8%)		 12/51
(23.5)		 4/28
(14.3%)		 20/106
(18.9%)
High 1/8
(12.5%)		 3/20
(15.0%)		 21/65
(32.3%)		 25/93
(26.9%)		 1/10
(10.0%)		 8/22
(36.4)		 23/72
(31.9%)		 32/104
(30.8%)
Total 8/86
(9.30%)		 12/87
(13.9%)		 28/96
(28.1%)		 48/269
(17.8%)		 15/97
(15.5%)		 22/96
(22.9%)		 28/108
(25.9%)		 65/301
(21.5%)
Age 2-5 Tertiles 2nd Premolar 2nd Molar
Age 5-8 Tertiles Total Age 5-8 Tertiles Total
Low Moderate High Low Moderate High
Low 9/57
(15.8%)		 2/22
(9.1%)		 1/8
(12.5%)		 12/87
(13.8%)		 2/54
(3.7%)		 2/20
(10.0)		 1/6
(16.7%)		 5/80
(6.3%)
Moderate 3/24
(12.5)		 12/48
(25.0%)		 3/22
(13.6%)		 18/94
(19.1%)		 3/27
(11.1%)		 7/35
(20.0)		 2/16
(12.5%)		 12/78
(15.4%)
High 0/7
(0.0)		 8/23
(34.8%)		 28/69
(40.6%)		 36/99
(36.4%)		 0/6
(0.0%)		 6/21
(28.6)		 20/66
(30.3%)		 26/93
(28.0%)
Total 12/88
(13.6)		 22/93
(23.7%)		 32/99
(32.3%)		 66/280
(23.6%)		 5/87
(5.7%)		 15/76
(19.7)		 23/88
(26.1%)		 43/251
(17.1%)
*

Fluorosis prevalence is defined as 2 or more teeth in a tooth group with definitive fluorosis using Fluorosis Risk Index criteria.

**

In each cell of Table 3, the denominator represents the total number of subjects who were in the row and column tertiles specified, while the numerator represents the number of subjects, out of those in the denominator, who had fluorosis prevalence. The value in parentheses in each cell is the percentage given by the fraction in that cell.