Change of urinary fluoride and bone metabolism indicators in the endemic fluorosis areas of southern china after supplying low fluoride public water

Table 3 Comparison of BGP、 CT、 ALP and Bone Mineral Density between the Intervention Villages and the Control Village after Chang of Water Supply, Guangdong, China

Village	BGP(μg/L)^*		CT(pg/ml)^*		ALP(U/L)^*		Bone density (g/cm²)^*
Village	n	$\bar{χ} \pm s$	n	$\bar{χ} \pm s$	n	$\bar{χ} \pm s$	n	$\bar{χ} \pm s$
A	119	16.19±3.18	120	256.44±103.39^#	117	29.88±9.02	98	0.29±0.06
B	98	13.81±2.40^#	98	156.81±57.82^#	98	33.06±15.79	77	0.26±0.04
C	73	15.77±3.45	63	126.44±39.49^#	73	27.02±7.56^#	71	0.28±0.07
D	109	14.23±2.56^#	111	179.48±57.66	108	25.39±7.06^#	95	0.29±0.07
E	127	15.81±2.77	127	197.21±51.29	127	31.90±10.15	113	0.27±0.04
F		14.465		48.959		9.831		3.781
P		0.000		0.000		0.000		0.005
Normal range^%		(10.38,21.24)		(96.68,297.74)		(12.01,51.79)		(0.19,0.35)
Mean^*		15.14±2.90		190.80±72.84		29.21±10.53		0.28±0.06
P ^**		= 0.01		> 0.1		< 0.01		≈ 0.1

*: By Shapiro-wilk test, BGP ,CT ,ALP and Bone Density are normal distribution(P>0.05).
^#: Pairwise comparisons using Dunnet t test method with the control village E, the difference was statistically significant (P<0.05).
^%:Normal ranges were calculated according to the control village.
*: Pooled mean from group A through D.
^**: P values of t test for mean difference between pooled mean and control mean.

ISSN: 1471-2458