Table I.

Sample Description by Row Percentage

NHANES, 2001–02 and 2011–12

	Number	2001–02 Weighted Number	Weighted %	RES* %	Number	2011–12 Weighted Number	Weighted %	RES* %	P-value
Fluorosis Severity									<.0001
Normal	258	3,806,709	60.7	9.2	87	2,459,906	39.3	14.3
Questionable	129	1,569,520	72.7	10.1	17	210,206	27.3	28.8
Very mild	145	1,628,611	52.6	12.3	60	1,468,377	47.4	13.7
Mild	40	518,699	26.4	16.6	46	1,444,843	74.6	6.0
Moderate	14	122,515	6.4	42.7	72	1,795,142	73.6	2.9
Severe	0				8	127,090	100.0
Fluorosis Severity									<.0001
Normal	258	3,806,709	60.7	9.2	87	2,459,906	39.3	14.3
Questionable	129	1,569,520	72.7	10.1	17	210,206	27.3	28.8
Very mild & above	199	2,269,825	31.9	13.2	186	4,835,453	68.1	6.2
Fluorosis (Dichotomized)									<.0001
Normal/questionable	387	5,376,229	63.8	7.3	104	3,049,593	36.2	12.9
Very mild and above	199	2,269,825	31.9	13.2	186	4,835,453	68.1	6.2
Sex									.0744
Female	279	3,621,936	45.7	9.1	148	4,294,973	54.3	7.6
Male	307	4,024,118	53.7	6.7	141	3,465,876	46.3	7.8
Race/Ethnicity									.7094
Non-Hispanic – White	171	4,661,473	51.8	10.9	63	8,999,644	48.2	11.8
Non-Hispanic – Black	174	1,011,293	44.2	14.5	93	1,274,976	55.8	11.5
Mexican
American	182	795,074	44.1	12.5	46	1,802,744	55.9	9.8
Other	59	1,178,215	50.8	11.7	87	1,140,030	49.2	12.1
Family Federal Poverty Level									.3506
Less than125% FPL	191	1,948,976	48.4	7.4	104	2,078,354	51.6	6.9
125% to less than 200% FPL	93	977,734	42.2	7.9	50	1,339,402	57.8	12.4
200% to less than 400% FPL	159	2,315,450	55.3	11.0	51	1,871,149	44.7	13.6
400% FPL and above	102	1,911,645	52.4	11.3	54	1,735,785	47.6	12.5
Insurance (Medical)									.6172
Yes	462	6,589,200	48.9	6.5	252	6,885,670	51.1	6.2
No	113	920,633	52.3	15.0	34	838,331	47.8	16.5

Abbreviations/symbols:

^*RES, Relative Standard Error (NHANES guidelines recommends a relative standard error less than 30%);

^#FPL, federal poverty level (Health and Human Services Policy guidelines were used as the measure for FPL)