. 2020 Apr 2;8:16. doi: 10.1038/s41413-020-0091-6

Table 1.

Calcium and phosphorus content as determined by energy-dispersive X-ray spectroscopy

Tissue	n	Percent atomic ratio		Ca/P ratio
Tissue	n	Calcium	Phosphorus	Ca/P ratio
Dystrophic calcification	18	8.85^a,b (1.30)	5.65^a,b (0.90)	1.57^a (0.05)
Heterotopic ossification	34	7.03^a (0.89)	4.53 (0.53)	1.55^a (0.05)
Cortical bone	13	6.05 (0.48)	4.13 (0.26)	1.47 (0.06)

Calcium and phosphorus content were determined by energy-dispersive X-ray spectroscopy and Ca/P ratio was calculated. Data are means (standard deviations) for regions of dystrophic calcification (2 spines; 18 regions total), heterotopic ossification (3 spines; 34 regions total), and unaffected cortical bone (3 spines; 13 regions total).

^aSignificantly greater than corresponding parameter for cortical bone (P < 0.05).

^bSignificantly greater than corresponding parameter for heterotopic ossification (P < 0.05); as determined using one-way ANOVA with Bonferroni’s multiple comparisons test.