Table 5.

Frequency of aligners by initial aligner category and per initial and refinement DTPs per dental arch.

	Initial aligner category									Total
	Mild			Moderate			Severe
	Median	25%–75% IQR	Range	Median	25%–75% IQR	Range	Median	25%–75% IQR	Range	Median	25%–75% IQR	Range
Initial DTP	14*	13–14	6–14	23*	20–25	15–29	35*	32–45	30–78	26	20–32	6–78
All Refinement plans	13*	7–14	0–15	15*	12–19	5–50	18*	13–26.75	0–73	20.5	14–31	0–132
Total	28*	19–40	13–57	42*	35–52	20–135	61.5*	35–52	30–175	47	37.25–65	13–175

^*P < 0.001 (Kruskal–Wallis test).

DTP, digital treatment plan; IQR, interquartile range.