Table 5. Patterns of Root canal width visibility of mandibular first, second, and third molars on both sides and both sexes. N – Number of participants, SD – Standard Deviation, RCW – Root Canal Width, A, B, C, U stands for different types of RCW.

Sex	Side	Type	N	Mean	SD	Minimum	Lower quartile	Median	Upper quartile	Maximum
Males	Right	RCW-A	22	19.39	2.38	16.56	17.98	18.34	20.45	26.05
		RCW-B	40	19.47	1.65	16.11	18.57	19.49	20.55	23.05
		RCW-C	84	22.74	2.53	16.61	21.31	22.68	24.76	28.26
		RCW-U	37	22.35	2.24	18.06	20.81	22.03	24.36	26.13
	Left	RCW-A	20	19.06	1.91	16.56	18.00	18.26	19.75	22.79
		RCW-B	38	19.89	2.28	16.11	18.64	19.41	21.11	26.05
		RCW-C	81	22.76	2.51	16.61	21.40	22.68	24.76	28.26
		RCW-U	44	21.85	2.34	17.92	20.25	21.32	23.68	26.13
Females	Right	RCW-A	41	19.67	2.51	15.76	17.43	19.59	21.30	25.61
		RCW-B	56	19.71	1.95	16.02	18.45	19.42	20.86	23.86
		RCW-C	76	22.68	2.33	17.20	20.99	22.59	23.97	27.97
		RCW-U	47	21.90	2.72	16.57	20.12	21.20	23.19	28.75
	Left	RCW-A	51	19.30	2.18	15.76	17.43	19.14	20.85	24.74
		RCW-B	36	20.18	2.59	16.02	18.45	19.95	21.15	26.24
		RCW-C	78	22.37	2.50	17.20	20.64	22.56	23.86	27.97
		RCW-U	55	21.95	2.37	18.51	20.24	21.25	23.14	28.75