Table 1.

Characteristics of the cases enrolled in this study and lifestyles according to questionnaire responses

Variables			Controls	GCTs	χ2	P value
Age, months (range)			22 (11–47)	29 (13–48)	/	0.558
Cases by Sex	Male		19	23	0.762	0.383
	Female		23	19
Diseases of cases	Germinoma		/	2		/
	Yolk Sac Tumor		/	33		/
	Teratoma		/	7		/
	Pneumonia		/		35	/
	Cranial Trauma		/		7	/
Mother Age in Birth	<30 years old		14	32	15.570	<0.001
	≥30 years old		28	10
Father Age in Birth	<30 years old		8	28	19.444	<0.001
	≥30 years old		34	14
Emergency Contraceptive Usage		Yes	8	12	1.050	0.306
		No	34	30
Infectious Disease during Pregnancy		Yes	7	18	4.850	0.013
		No	35	26
Hair Dye Usage during Pregnancy		Yes	9	17	3.565	0.059
		No	33	25
Cosmetics Usage during Pregnancy		Yes	5	13	4.525	0.033
		No	37	29
Barbecue during Pregnancy		Yes	10	24	9.685	0.002
		No	32	18
Filtered Water Drinking during Pregnancy		Yes	21	11	5.048	0.025
		No	21	31
Indoor-decorating during Pregnancy		Yes	4	17	10.730	0.001
		No	38	25
Insecticide Exposure during Pregnancy		Yes	0	0	/	N/A
		No	42	42
Lead Exposure during Pregnancy		Yes	0	1	1.012	0.500*
		No	42	41
Living near Possible Pollution Sources
Farmland		Yes	2	8	4.086	0.043
		No	40	34
Chemical Plant		Yes	0	0	/	N/A
		No	42	42
Industrial Smog		Yes	3	0	3.111	0.241*
		No	39	42
Generating Station		Yes	7	1	4.974	0.057*
		No	35	41

GCT=Germ cell tumor.

* Fisher’s exact test.