Table 3.

Frequency of stone recurrence according to the stone composition

	Males		Females		Total
Component	N	%	N	%	N	%
ACCP(1)	8	32.0	13	30.2	21	30.9
Whitlockite	10	32.3	14	38.9	24	35.8
Whewellite (COM)	5241	39.5***, e	1768	34.1 e	7013	38.0e
Struvite	143	47.0**	121	36.7	264	41.6
Presence of struvite	492	44.9***	526	36.5	1018	40.1
Ammonium Urate	28	36.8	32	47.1	60	41.7
Weddellite (COD)	2883	45.2***	625	37.2	3508	43.5a
Carbapatite	1022	48.8***, e	1143	39.9	2165	43.6a
Uric acid anhydrous	1193	52.1*, e	329	46.8c	1522	50.9e
Uric acid dihydrate	198	50.6a	50	55.6b	248	51.6c
Octacalcium phosphate	28	63.6*, a	15	45.5	43	55.8
Brushite	479	75.7e	143	70.8e	622	74.5e
Cystine	378	90.9e	293	86.7e	671	89.0e
Dihydroxyadenine	19	95.0d	7	100b	26	96.3e
All stones	11702	44.4***	4634	38.9	16341	42.7

⁽¹⁾ACCP = amorphous carbonated calcium phosphate

^*p < 0.05;

^**p < 0.01;

^***p < 0.00001 vs females

^ap < 0.05;

^bp < 0.01;

^cp < 0.001;

^dp < 0.0001;

^ep < 0.00001 vs mean recurrence for a given gender or by comparison to the whole series