Fig. 5
From: Independent impacts of aging on mitochondrial DNA quantity and quality in humans
mtDNA copy number association with phenotypic traits. a mtDNA copy number was positively associated with serum bicarbonate level (P = 4.46e-5). The reference range for bicarbonate level is 22–29 mmol/L (b) mtDNA copy number was negatively associated with WBC count (P = 0.0006). The reference range for WBC count is 4.0–11.0 (×109/L). The blue lines represent linear regression lines in each case