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. 2019 Feb 5;89(3):372–377. doi: 10.2319/041218-274.1

Table 1.

R Value (Percentage ± Standard Deviation) of the Two Treatments at T0, T1, T6, and T12, Along With P Values

Group	Time				P Value
Group	T0	T1	T6	T12	T0 vs T1	T1 vs T6	T1 vs T12	T6 vs T12
Infiltration	36.13 ± 9.94	5.85 ± 4.84	4.31 ± 3.34	4.32 ± 3.69	<.0001	.0549	.0999	.9911
Microabrasion	34.03 ± 13.66	17.39 ± 11.9	12.82 ± 10.65	10.99 ± 9.53	<.0001	<.0001	<.0001	.0313
P value	.5194	<.0001	.0002	.0013

T0: before treatment; T1: 1 week after treatment; T6: 6 months after treatment; T12: 12 months after treatment.