Table 2.

Multiple linear regression analysis of the relationship between mtDNA 4,977 bp deletion level and age, BMI, metastasis status and stage of cancer in tumor and non-tumor tissues in 20 patients with the deletion.

Deletion level	Characteristics	Coefficients (B)	95% CI for B	p-value
Non-tumor	Age	0.000	-0.002 to 0.001	0.245
	BMI	0.000	-0.003 to 0.004	0.859
	LN metastasis	-0.023	-0.074 to 0.029	0.337
	Stage	-0.011	-0.043 to 0.020	0.415
Tumor	Age	0.000	0.000 to 0.000	0.141
	BMI	0.000	0.000 to 0.001	0.471
	LN metastasis	-0.006	-0.014 to 0.002	0.115
	Stage	-0.005	-0.010 to 0.000	0.031*

BMI, body mass index; LN metastasis, lymph node metastasis; Stage, tumor-node-metastasis (TNM) stage; Coefficients: the effect of the corresponding characteristics on deletion level; 95% CI, 95% confidence interval; * statistically significant.