Child Skeletal Fluorosis from Indoor Burning of Coal in Southwestern China

Table 4

Prevalence of Dental Fluorosis (DF) and distribution of Dean's Fluorosis Index Scores among 370 sampled children in a coal-burning endemic fluorosis area, Zhijin, Guizhou, China, 2004.

Skeletal Fluorosis Status	Dean's Fluorosis Index Scores							Prevalence^§ of DF
		Normal	Questionable	Very mild	Mild	Moderate	Severe
	𝑛	𝑛 (%)	𝑛 (%)	𝑛 (%)	𝑛 (%)	𝑛 (%)	𝑛 (%)	(%)
Yes	122	0	1 (0.3)	3 (0.8)	9 (2.4)	71 (19.2)	38 (10.3)	99.2
No	248	10 (2.7)	1 (0.3)	4 (1.1)	32 (8.7)	130 (35.1)	71 (19.2)	95.6
Total	370	10 (2.7)	2 (0.5)	7 (1.9)	41 (11.1)	201 (54.3)	109 (29.5)	96.8

^§Data do not include questionable DF cases.