Table 3.

Multivariable ordinal logistic regression analysis of the associations of factors with ultrasound image grades

Value	B	SE	Wald	P value	aOR (95% CI)
Threshold Grade =1a	-0.388	1.164	0.111	0.739	0.68 (0.07-6.64)
Grade =2b	2.349	1.161	4.093	0.043	10.47 (1.08-101.87)
N=3	2.24	0.64	12.247	<0.001	9.4 (2.68-32.96)
N=2	2.561	0.649	15.589	<0.001	12.95 (3.63-46.18)
N=1	0c				Reference
Expanded excision	2.496	0.722	11.963	0.001	12.14 (2.95-49.95)
Standard excision	0c				Reference
Right	0.307	0.453	0.458	0.499	1.36 (0.56-3.3)
Left	0c				Reference
Male	-0.328	0.451	0.526	0.468	0.72 (0.3-1.75)
Female	0c				Reference
Age	-0.3	0.019	2.529	0.112	0.97 (0.94-1.01)

Abbreviations: GUIs, grades of US images; B, regression coefficient B; SE, standard error; Wald: Wald value; ORaj: odds ratios adjusted; 95% CI, confidence interval of 95%. Notes: Adjusted variables are N component, resection range, gender, side and age;

^agrade 1 vs grade 2 and grade 3;

^bgrade 1 and grade 2 vs grade 3;

^cthis parameter is set to zero because it is redundant.