African Journal of Urology

Table 2 Relation between density of the stone in HU, size of the stone, and its PKUB findings

From: Can stone composition be predicted by plain X-ray and/or non-contrast CT? A study validated by X-ray diffraction analysis

	PKUB findings				P value
	Dense opaque	Opaque	Faint opaque	Lucent	P value
HU
Mean ± SD	1195.3 ± 146.8	868.1 ± 149.4	527.8 ± 138.5	443.8 ± 99.3	0.001**
Median	1195	885	500	400	0.001**
Size
Mean ± SD	2.9 ± 1.3	2.8 ± 1.2	3.2 ± 1.4	2.6 ± 1.1	0.711
Median	2.5	2.6	3	3	0.711

**Statistically significant difference (P level < 0.01)

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