Table 2.

Comparison of the mean root to crown ratios in males and females

Teeth	Gender	N	Mean	SD	95% CI	P value	FDR
8,9	F	329	1.80	0.26	1.77–1.82	0.1098	0.3074
	M	293	1.84	0.28	1.80–1.87
7,10	F	286	2.02	0.30	1.99–2.06	0.0749	0.2706
	M	252	2.09	0.35	2.04–2.13
6,11	F	242	2.21	0.36	2.16–2.25	0.0557	0.2706
	M	190	2.12	0.36	2.07–2.18
5,12	F	152	2.13	0.35	2.08–2.19	0.0773	0.2706
	M	140	2.05	0.31	2.00–2.11
4,13	F	200	2.15	0.38	2.10–2.21	0.9929	0.9929
	M	190	2.15	0.39	2.09–2.20
3,14	F	212	2.04	0.32	2.00–2.08	0.3006	0.5793
	M	174	1.98	0.33	1.93–2.03
2,15	F	231	2.11	0.32	2.07–2.15	0.5673	0.722
	M	192	2.09	0.33	2.04–2.14
24,25	F	290	1.83	0.30	1.80–1.87	0.0040*	0.056
	M	224	1.94	0.34	1.89–1.98
23,26	F	279	1.97	0.33	1.93–2.01	0.4381	0.6133
	M	217	1.99	0.34	1.95–2.04
22,27	F	240	2.17	0.40	2.12–2.22	0.2641	0.5793
	M	181	2.21	0.40	2.16–2.27
21,28	F	274	2.35	0.39	2.31–2.40	0.3724	0.5793
	M	220	2.30	0.44	2.24–2.36
20,29	F	247	2.49	0.39	2.44–2.53	0.7127	0.8315
	M	216	2.49	0.41	2.43–2.54
19,30	F	193	2.19	0.24	2.16–2.23	0.9684	0.9929
	M	164	2.20	0.34	2.15–2.26
18,31	F	216	2.10	0.32	2.06–2.14	0.3659	0.5793
	M	197	2.07	0.31	2.03–2.12

^*P<0.05. F: female; M: male; SD: standard deviation; CI: confidence interval; FDR: false discovery rate