Table 2.

The descriptive statistics for the prevalence of tooth discoloration, pulp obliteration, and taurodontism in different variant types.

Variant	Median	Mean±SD	95% CI
Tooth discoloration
α1 haploinsufficiency	0	0.019±0.13	−0.0 – 0.04
Helical α.1.Gly. substitution	0	0.48±0.48	0.39 – 0.59
Helical α.2.Gly. substitution	0	0.39±0.49	0.33– 0.45
Splice-site	0	0.69±0.38	0.02 – 0.11
C-propeptide	0	0	0
Pulp obliteration
α1 haploinsufficiency	0	0.08±0.26	0.02 – 0.10
Helical α.1.Gly. substitution	0	0.18±0.39	0.11 – 0.25
Helical α.2.Gly. substitution	0	0.18±0.38	0.13 – 0.23
Splice-site	0	0.13±0.33	0.07 – 0.18
C-propeptide	0	0.22±0.41	.06 – 1.93
Taurodontism
α1 haploinsufficiency	0	0.04±0.20	0.01 – 0.06
Helical α.1.Gly. substitution	0	0.08±0.28	0.03 – 0.13
Helical α.2.Gly. substitution	0	0.01±0.08	−0.00 – 0.02
Splice-site	0	0.96±0.32	0.06 – 0.18
C-propeptide	0	0.04±0.21	−0.02 – 0.11

Mean and standard deviation (SD), and the confidence interval (CI), were calculated based on the number of affected teeth/patient.