Egyptian Journal of Forensic Sciences

Table 5 Age distribution of participants according to Moorrees and Haavikko root development stages of tooth 38 (n = 671)

From: Determination of age reference standards based on mandibular third molar root development in a Ugandan population aged 10–22 years

Method	Males							Females
Method	Tooth formation stages		No. of cases	Mean	SD	95% CI	Medians	No. of cases	Mean	SD	95% CI	Medians	§Mean difference	^ꝩp-value
MFH	D	R_i	26	13.5	0.36	12.83–14.2	13.5	36	12.6	0.28	12.08–13.18	12.6	−0.9	0.029
	E	R_cl	51	15.1	0.29	14.53–15.68	15.1	52	14.5	0.30	13.85–15.07	14.5	−0.6	0.111
	E	R_1/4	46	16.3	0.29	15.78–16.92	16.3	55	14.9	0.26	14.48–15.48	14.9	−1.4	0.001
	F	R_1/2	39	17.1	0.28	16.48–17.63	17.0	40	15.7	0.27	15.19–16.24	15.7	−1.4	0.001
	F	R_3/4	43	17.6	0.34	16.90–18.30	17.6	43	16.9	0.31	16.31–17.56	16.9	−0.7	0.110
	G	R_c	47	19.1	0.24	18.55–19.51	19.0	49	18.9	0.27	18.34–19.41	18.9	−0.3	0.351
	G	A_1/2	20	19.0	0.43	18.16–19.19	19.90	9	18.2	0.59	17.00–19.43	18.2	−0.4	0.458
	H	A_c	73	20.1	0.16	19.79–20.44	20.1	42	19.8	0.28	19.31–20.42	19.8	−0.9	0.330
Haavikko	D	R_i	26	13.5	0.35	12.86–14.22	13.5	36	12.6	0.29	12.09–13.21	12.6	−0.9	0.029
	E	R_1/4	97	15.7	0.21	15.25–16.11	15.7	107	14.7	0.19	14.33–15.11	14.7	−1.0	0.001
	F	R_1/2	39	17.1	0.28	16.53–17.61	17.0	40	15.7	0.26	15.21–16.23	15.7	−1.4	0.000
	F	R_3/4	43	17.6	0.36	16.88–18.31	17.6	43	16.9	0.28	16.38–17.48	16.9	−0.7	0.110
	G	R_c	67	19.1	0.20	18.66–19.42	19.0	58	18.8	0.23	18.31–19.23	18.8	−0.2	0.405
	H	A_c	73	20.1	0.16	19.78–20.45	20.1	42	19.8	0.28	19.29–20.42	19.8	−0.3	0.288

Root stages R_i–A_c are the 8 stages of MFH’s classification, while the Haavikko’s classification has only 6 root stages excluding MFH root stages R_cl and A_1/2

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