Table 2.

Exploratory age-stratified analysis of prediction error.

Age group (years)	n	Method	MAE [95% CI]	MSE [95% CI]	RMSE [95% CI]
7.5–<11	13	App Dental Age	1.26 [0.78–1.84]	2.61 [0.93–4.83]	1.61 [0.97–2.20]
		Manual (Traditional)	1.24 [0.76–1.83]	2.56 [0.91–4.80]	1.60 [0.95–2.19]
11–<14	30	App Dental Age	0.95 [0.68–1.30]	1.76 [0.60–3.44]	1.33 [0.78–1.86]
		Manual (Traditional)	0.95 [0.66–1.30]	1.82 [0.59–3.49]	1.35 [0.77–1.87]
14–15.9	20	App Dental Age	0.62 [0.35–0.96]	0.83 [0.25–1.71]	0.91 [0.50–1.31]
		Manual (Traditional)	0.61 [0.34–0.96]	0.84 [0.23–1.79]	0.92 [0.48–1.34]