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

Table 8.

Association between TDIs and patients’ characteristics utilizing multi-regression analysis. Each explanatory variable was studied without adding the other variables. Values are number (95% CI).

		OR	p-value
Occlusal stage	Primary dentition	3.640 (1.47–8.95)	0.005 ^*
Occlusal stage	Mixed dentition	1^**
Age (years)	4–6	2.140 (0.70–6.53)	0.180
	7–9	0.444 (0.11–1.78)	0.252
	10–13	1^**
the resident’s assessment of the difficulty of intubation	Difficult	1^**
the resident’s assessment of the difficulty of intubation	Not difficult	0.020 (0.01–0.08)	0.001 ^*
Occlusal classification of intermolar relationship	Class I	0.286 (0.04–1.82)	0.185
	Class II	0.923 (0.12–6.78)	0.937
	Class III	6.000 (0.56–63.98)	0.138
	Straight line	0.364 (0.02–4.73)	0.440
	Mesial step	1.200 (0.22–6.62)	0.816
	Distal step	1^**
Mallampati score	I	0.074 (0.01–0.36)	0.001 ^*
	II	0.133 (0.03–0.53)	0.004 ^*
	III	0.909 (0.29–2.79)	0.868
	IV	1^**
Gingivitis	Yes	2.700 (1.09–6.67)	0.030 ^*
Gingivitis	No	1^**
Number of attempts		2.270 (1.65–3.13)	0.001 ^*
Inter-incisor distance (cm)		0.222 (0.09–0.49)	0.001 ^*
The distance between the mental and thyroid cartilage (cm)		0.629 (0.42–0.94)	0.024 ^*

TDIs, traumatic dental injuries; CI, confidence intervals, OR, odds ratios; ^**, the reference; ^*, significant difference p-value < 0.05, p-values written in bold are statistically significant (p < 0.05).