Fig. 3
Correlations among blood vessel counts per 1 mm2 of induced membranes and the patients’ characteristics. a Patients’ age (x axis) and blood vessel counts (y axis), correlation coefficient = 0.017, p = 0.920; b duration of cement placement (days) (x axis) and blood vessel counts (y axis), correlation coefficient = − 0.141, p = 0.412; c histological grading of inflammation (x axis) and blood vessel counts (y axis), correlation coefficient = 0.166, p = 0.332; d histological grading of foreign body reaction (x axis) and blood vessel counts (y axis), correlation coefficient = −0.199, p = 0.246; and e histological grading of fibrosis (x axis) and blood vessel counts (y axis), correlation coefficient = 0.292, p = 0.084