Table 2.

Study error analysis. Systematic error (ICC), 95% confidence interval (CI) and random error (Dahlberg’s formula) for the variables dental crowding (LI), tooth wear, intercanine (3–3) width and arch perimeter

Variable	Systematic error ICC (CI 95%)	Random error (Dahlberg)
Maxilla
LI	0.89 (0.66–0.96)	0.28
Tooth wear	0.73 (0.32–0.91)	0.12
3–3 width	0.97 (0.89–0.99)	0.15
Arch perimeter	0.92 (0.74–0.97)	0.56
Mandible
LI	0.91 (0.74–0.97)	0.24
Tooth wear	0.93 (0.79–0.98)	0.08
3–3 width	0.89 (0.67–0.97)	0.21
Arch perimeter	0.88 (0.66–0.96)	0.36