Table 4.

Comparison of mean TAS according to socio-economic status.

SES	Photograph Gender	Fluorosis				P-value
		Present		Absent
		N	Mean TAS ±SD	N	Mean TAS ±SD
Upper	Boy	104	24.45 ± 4.26	104	33.81 ± 5.30	<0.001
	Girl	104	27.38 ± 4.18	104	36.42 ± 4.71	<0.001
Middle	Boy	107	24.49 ± 5.10	122	33.69 ± 4.79	<0.001
	Girl	107	27.26 ± 4.48	122	35.37 ± 4.07	<0.001