. 2025 Nov 25;25:1925. doi: 10.1186/s12903-025-07405-0

Table 2.

Preferred crowding severity and malocclusion types managed with CAT according to clinical experience

How many millimeters of crowding do you treat with CAT?	1–2 years	2–5 years	5–10 years	χ²	p value	No cases	1–10 cases	11–30 cases	30 +	χ²	p value
How many millimeters of crowding do you treat with CAT?	n (%)	n (%)	n (%)	χ²	p value	n (%)	n (%)	n (%)	n (%)	χ²	p value
1–4 mm	74 (70.5)^a	50 (47.6)^b	9 (36.0)^b	45.640	< 0.001*	36(78.3)^a	49(56.3)^ab	22(59.5)^ab	26(40.0)^b	96.872	< 0.001*
4–8 mm	73 (69.5)^a	88 (83.8)^b	20 (80.0)^{a, b}			18(39.1)^a	72(82.8)^b	37(100)^c	54(83.1)^b
8–10 mm	33 (31.4)^a	45 (42.9)^a	8 (32.0)^a			12(26.1)^a	30(34.5)^a	15(40.5)^a	29(44.6)^a
10 mm +	10 (9.5)^a	23 (21.9)^b	12 (48.0)^c			5(5.7)^a	6(13)^ab	11(29.7)^bc	23(35.4)^c
				Cramer’s V 0.158						Cramer’s V 0.154
Class I spacing	69 (65.7)^a	77 (73.3)^a	21 (84.0)^a	141.529	< 0.001*	26(56.5)^a	59(67.8)^ab	27(73)^ab	55(84.6)^b	202.934	< 0.001*
Class I crowding	103 (98.1)^a	103 (98.1)^a	21 (84.0)^a			44(95.7)^a	85(97.7)^a	37(100)^a	61(93.8)^a
Class I deep bite	51 (48.6)^a	77 (73.3)^b	21 (84.0)^b			19(41.3)^a	54(62.1)^ab	24(64.9)^ab	52(80.0)^b
Class I open bite	59 (56.2)^a	74 (70.5)^{a, b}	21 (84.0)^b			19(41.3)^a	51(58.6)^a	31(83.8)^b	53(81.5)^b
Class II deep bite	40 (38.1)^a	78 (74.3)^b	19 (76.0)^b			15(32.6)^a	44(50.6)^a	29(78.4)^b	49(75.4)^b
Class II open bite	43 (41.0)^a	69 (65.7)^b	17 (68.0)^b			20(43.5)^a	31(35.6)^a	33(89.2)^b	45(69.2)^b
Class III deep bite	15 (14.3)^a	43 (41.0)^b	16 (64.0)^b			7(15.2)^a	11(12.6)^a	20(54.1)^b	36(55.4)^b
Class III open bite	19 (18.1)^a	41 (39.0)^b	14 (56.0)^b			6(13)^a	17(19.5)^a	22(59.5)^b	29(45.3)^b
				Cramer’s V 0.115						Cramer’s V 0.116

The left part of the table shows how many years orthodontists have been providing CAT. The right part shows the number of CAT cases they have completed

* p value from chi-squared tests

^a−c No difference between interactions with the same letter