Table 4.

Wald test for predictive margins of DH measurements stratified by time.

Variables	Contrast	SE	z	p	95% Confidence Intervals
					Lower Bound	Upper Bound
Tiefenfluorid vs. Enamelast before treatment	−0.13	0.07	−1.92	0.055	−0.26	0.00
after 7 days	0.44 **	0.07	6.45	<0.001	0.31	0.57
after 14 days	1.07 **	0.07	15.39	<0.001	0.93	1.21
after 1 month	1.62 **	0.07	22.71	<0.001	1.48	1.76
after 3 months	2.11 **	0.07	28.86	<0.001	1.97	2.25
after 6 months	4.09 **	0.07	54.28	<0.001	3.94	4.24

** Statistically significant at p < 0.01.