Table 1.

Characteristics of children diagnosed with cancer and controls (2012-2015).

Characteristic		Cases		Controls		P value
		N	%	N	%
Age, years						0.119
	<1	16	5.2	42	6.8
	01-04	83	26.8	145	23.4
	05-09	76	24.5	167	26.9
	10-14	87	28.1	171	27.6
	15-18	48	15.5	95	15.3
Sex						0.963
	Male	175	56.5	349	56.3
	Female	135	43.6	271	43.7
Origin						0.349
	Coast	233	75.2	485	78.2
	Andean	59	19.0	95	15.3
	Forest	18	5.8	40	6.5
Maternal age at birth, years						0.239
	<20	17	5.5	36	5.8
	20-24	88	28.4	138	22.3
	25-29	72	23.2	194	31.3
	30-34	81	26.1	135	21.8
	>35	52	16.8	117	18.9
	Mean (SD)	28.92 (6.30)		28.47 (6.16)
	Missing	1		8
Paternal age at birth, years						0.520
	<20	4	1.3	15	2.8
	20-24	40	12.9	67	12.6
	25-29	85	27.5	128	24.1
	30-34	81	26.2	122	23.0
	>35	99	32.0	199	37.5
	Mean (SD)	31.74 (6.82)		32.37 (7.82)
	Missing	1		89
Education level of the mother						0.801
	Elementary school	26	8.5	22	9.6
	High school	116	37.8	90	39.3
	Higher education	165	53.8	117	51.1
	Missing	3		391
Education level of the father						0.039
	Elementary school	9	2.9	14	6.2
	High school	100	32.7	87	38.5
	Higher education	197	64.4	125	55.3
	Missing	4		394
Birth order						0.002
	1	188	60.8	354	57.1
	2	84	27.2	175	28.2
	3	26	8.4	63	10.2
	4	10	3.2	15	2.4
	>=5	1	0.3	13	2.1
	Missing	1		0
Twins						0.090
	Yes	2	0.6	7	1.1
	No	308	99.4	613	98.9
TOTAL		310	100.0	620	100.0