. 2025 Jan 4;15:830. doi: 10.1038/s41598-025-85573-3

Table 6.

Association between incidence of TDIs and factors studied using Chi-square test.

		Incidence of TDIs during ETI in GA				p-value
		No		Yes
		N	%	N	%
Gender	Male	82	83.70	16	16.30	0.881
Gender	Female	44	84.70	8	15.30	0.881
Occlusal stage	Primary dentition	35	71.50	14	28.50	0.003 ^*
Occlusal stage	Mixed dentition	91	90.10	10	9.90	0.003 ^*
Age (years)	4–6	42	73.70	15	26.30	0.017 ^*
	7–9	54	93.10	4	6.90
	10–13	30	85.70	5	14.30
Year of the residency	1	19	82.60	4	17.40	0.417
	2	46	79.40	12	20.60
	3	35	92.10	3	7.90
	4	26	83.90	5	16.10
The resident’s assessment of the difficulty of intubation	Difficult	17	44.70	21	55.30	0.001 ^*
The resident’s assessment of the difficulty of intubation	Not difficult	109	97.30	3	2.70	0.001 ^*
Evaluation of the temporomandibular Joint	Normal	119	85.60	20	14.40	0.105
Evaluation of the temporomandibular Joint	Not normal	7	63.30	4	36.70	0.105
Occlusal classification of intermolar relationship	Class I	56	93.40	4	6.60	0.017 ^*
	Class II	13	82.40	3	17.60
	Class III	2	40.00	3	60.00
	Straight line	11	91.70	1	8.30
	Mesial step	36	76.60	11	23.40
	Distal step	8	80.00	2	20.00
Mallampati score	I	49	96.10	2	3.90	< 0.001*
	II	41	93.20	3	6.80
	III	16	66.70	8	33.30
	IV	20	64.50	11	35.50
DMFT + dmft	00	27	90.00	3	10.00	0.105
	1–2	14	77.80	4	22.20
	3–4	15	68.20	7	31.80
	> 5	70	87.50	10	12.50
Gingivitis	Yes	15	75.00	5	25.00	0.017 ^*
Gingivitis	No	85	94.40	5	5.60	0.017 ^*

TDIs, traumatic dental injuries; ETI, endotracheal intubation GA, general anesthesia; N, number of cases; %, percentage of cases according to incidence of TDIs; ^*, significant difference p-value < 0.05, p-values written in bold are statistically significant (p < 0.05); DMFT, mean number of decayed, missing, and filled permanent teeth; dmft, mean number of decayed, missing, and filled primary teeth.