. 2021 Oct 5;2021:7488855. doi: 10.1155/2021/7488855

Table 2.

Caries status of the 140 children in different CRT-SM levels over two years.

Examination	SM level	Number of participants	Number of caries cases	Caries prevalence (%)	SNK		χ ²	P	dmft ( $\bar{x} \pm s$ )	SNK		χ ²	P	dmfs ( $\bar{x} \pm s$ )	SNK		χ ²	P	CSI ( $\bar{x} \pm s$ )	SNK		χ ²	P
Initial exam	0	49	8	16.33	B		12.66	<0.001	0.45 ± 1.08	B		15.63	<0.01	0.53 ± 1.32	B		15.14	<0.01	1.22 ± 2.93	B		16.40	<0.001
	1	33	11	33.33	B	A			1.39 ± 2.50	B	A			2.15 ± 4.18	B	A			4.28 ± 9.67	B	A
	2	31	15	48.39		A			2.19 ± 2.97		A			2.77 ± 4.43		A			6.45 ± 9.78		A
	3	27	14	51.85		A			2.63 ± 3.33		A			4.78 ± 8.14		A			9.58 ± 12.30		A

Follow-up exam after two years	0	49	25	51.02	B		11.07	<0.001	1.98 ± 2.76	C		23.71	<0.0001	2.82 ± 4.34	C		23.35	<0.0001	5.56 ± 8.49	C		24.69	<0.0001
	1	33	22	66.67	B				3.30 ± 3.87	C	B			5.27 ± 7.07	C	B			9.81 ± 13.39	C	B
	2	31	22	70.97	B	A			4.52 ± 4.55		B			6.61 ± 7.44		B			13.83 ± 15.78		B
	3	27	24	88.89		A			6.96 ± 4.69		A			12.37 ± 10.65		A			23.56 ± 18.20		A

Increase over two years	0	49	17	34.69	A		0.06	>0.05	1.53 ± 2.27	B		14.74	<0.01	2.29 ± 3.83	B		19.03	<0.001	4.34 ± 7.42	B		17.93	<0.001
	1	33	11	33.33	A				1.91 ± 2.43	B				3.12 ± 4.23	B				5.53 ± 6.78	B
	2	31	7	22.58	A				2.32 ± 2.59	B				3.84 ± 4.36	B				7.38 ± 8.11	B
	3	27	10	37.04	A				4.33 ± 3.43	A				7.59 ± 6.45	A				13.98 ± 12.32	A

Note. Differences between groups with identical letters denoting SNK ranking are not statistically significant, while differences between groups with different letters are statistically significant. The level of SNK is ranked alphabetically.