Status of dental caries and associated factors in Tibetan adults: findings from the fourth China National Oral Health Survey

Table 2 Root caries status of three age groups in Tibet, 2015–2016

Age group	Variables	n	%	DF-Root		D-Root		Rate (%)	F-Root		Rate(%)	RCI (%)
Age group	Variables	n	%	Mean	SD	Mean	SD	Rate (%)	Mean	SD	Rate(%)	RCI (%)
35–44	Male	71	28.2	0.52	1.15	0.52	1.15	100	0.00	0.00	0	38.46
	Female	78	26.8	0.49	0.94	0.49	0.94	100	0.00	0.00	0	46.67
	Urban	78	28.2	0.54	1.07	0.54	1.07	100	0.00	0.00	0	43.13
	Rural	71	26.8	0.46	1.01	0.46	1.01	100	0.00	0.00	0	41.30
	Total	149	27.5	0.50	1.04	0.50	1.04	100	0.00	0.00	0	42.27
55–64	Male	73	41.1	1.11	2.33	1.11	2.33	100	0.00	0.00	0	44.12
	Female	78	38.5	0.97	1.69	0.97	1.69	100	0.00	0.00	0	46.88
	Urban	73	42.5	1.03	1.70	1.03	1.70	100	0.00	0.00	0	46.97
	Rural	78	37.2	1.05	2.29	1.05	2.29	100	0.00	0.00	0	43.94
	Total	151	39.7	1.04	2.02	1.04	2.02	100	0.00	0.00	0	44.78
65–74	Male	80	48.8	1.03	1.44	1.01	1.44	98.78	0.01	0.11	1.22	60.00
	Female	66	50.0	1.67	2.73	1.67	2.73	100	0.00	0.00	0	55.00
	Urban	71	53.5	1.37	1.94	1.37	1.94	100	0.00	0.00	0	61.29
	Rural	75	45.3	1.27	2.32	1.25	2.32	98.95	0.01	0.12	1.05	53.97
	Total	146	49.3	1.32	2.14	1.31	2.14	99.48	0.01	0.08	0.52	57.60
Total		446	38.8	0.95	1.83	0.95	1.83	99.76	0.00	0.05	0.24	48.87

*P < 0.05when comparing means between male and female, or urban and rural
Abbreviations: D-Root decayed root, F-Root filled root, DF-Root decayed and filled root, S.D. standard deviation, RCI root caries index

ISSN: 1472-6831