. 2014 Dec 8;2014:589856. doi: 10.1155/2014/589856

Table 2.

Distribution of patients according to predictive variables and correlation of variables and occurrence of intraoperative adverse events.

Variable	Overweight patients			Occurrence of adverse events
	Classification	n	%	Yes		P value	OR (IC to 95%)
	Classification	n	%	n	%	P value	OR (IC to 95%)
Age	<25 years	132	47.1	34	25.8	P ⁽¹⁾ = 0.221	1.00
Age	≥25 years	148	52.9	48	32.4	P ⁽¹⁾ = 0.221	1.38 (0.82 to 2.33)

Gender	Female	208	74.3	50	24.0	P ⁽¹⁾ = 0.001^*	2.53 (1.44 to 4.44)
Gender	Male	72	25.7	32	44.4	P ⁽¹⁾ = 0.001^*	1.00

Associated pathologies	None	212	75.7	54	25.5	P ⁽²⁾ < 0.001^*	∗∗
	Pericoronitis	40	14.3	14	35.0		∗∗
	Caries	16	5.7	13	81.3		∗∗
	Bone resorption	12	4.3	1	8.3		∗∗

Level of occlusal plane—Pell and Gregory	High	208	74.3	62	29.8	P ⁽¹⁾ = 0.021^*	∗∗
	Medium	56	20.0	20	35.7		∗∗
	Low	16	5.7	∗∗	∗∗		∗∗

Available retromolar space—Pell and Gregory	Sufficient	156	55.7	34	21.8	P ⁽¹⁾ = 0.001^*	1.00
	Reduced	100	35.7	34	34.0		1.85 (1.05 to 3.24)
	Insufficient	24	8.6	14	58.3		5.02 (2.05 to 12.31)

Impaction angle (Winter)	Horizontal	28	10.0	6	21.4	P ⁽¹⁾ = 0.605	1.00
	Mesioangular	76	27.1	22	28.9		1.62 (0.62 to 4.23)
	Vertical	176	62.9	54	30,7		1.49 (0.53 to 4.18)
	Distoangular	—	—	∗∗	∗∗

Number of roots	One fused root	112	40.0	22	19.6	P ⁽¹⁾ < 0.001^*	∗∗
	≥2 roots	152	54.3	60	39.5		∗∗
	Tooth germ	16	5.7	∗∗	∗∗		∗∗

Root curvature	No	220	78.6	66	30.0	P ⁽¹⁾ = 0.615	1.00
Root curvature	Yes	60	21.4	16	26.7	P ⁽¹⁾ = 0.615	1.18 (0.62 to 2.24)

Tooth relation with mandibular canal	No	152	54.3	44	28.9	P ⁽¹⁾ = 0.892	1.00
Tooth relation with mandibular canal	Yes	128	45.7	38	29.7	P ⁽¹⁾ = 0.892	1.04 (0.62 to 1.74)

Relation with the 2nd molar	None	116	41.4	30	23.4	P ⁽¹⁾ < 0.001^*	1.00
	Crown alone	128	45.7	6	30.0		1.40 (0.50 to 3.96)
	Crown/root	20	7.1	12	75.0		9.80 (2.94 to 32.64)
	Root alone	16	5.7	34	29.3		1.35 (0.77 to 2.40)

Crown width	Nonbulbous	192	68.6	52	27.1	P ⁽¹⁾ = 0.232	1.39 (0.81 to 2.40)
Crown width	Bulbous	88	31.4	30	34.1	P ⁽¹⁾ = 0.232	1.00

Periodontal space	Radiolucent	200	71.4	49	24.5	P ⁽¹⁾ = 0.025^*	1.00
	Mixed	64	22.9	24	37.5		2.27 (1.21 to 4.27)
	Radioopaque	16	5.7	9	56.3		4.45 (1.50 to 13.44)

Total		280	100.0	82	29.3

^*Significant association at 5.0%, (—) Undetermined because of sample size, ⁽¹⁾Pearson's chi-square test, ⁽²⁾Fisher's exact test.