Table 1.

Associations between fertility and subsequent risk of testicular cancer in Danish men

Detail	No (%)	No (%) of	Odds ratio	Adjusted odds ratio*  (95% CI)
	of cases (n=514)	controls	(95% CI)
		(n=720)
Ever impregnated woman	276 (54)	486 (68)	0.63 (0.47 to 0.83)	0.65 (0.48 to 0.88)
Ever fathered child	232 (45)	427 (59)	0.63 (0.47 to 0.85)	0.68 (0.50 to 0.94)
No of children:
0	282 (55)	293 (41)	1.00	1.00
1	75 (15)	114 (16)	0.69 (0.47 to 0.99)	0.75 (0.51 to 1.10)
2	117 (23)	197 (27)	0.65 (0.46 to 0.92)	0.68 (0.47 to 0.98)
⩾3	40 (8)	116 (16)	0.44 (0.28 to 0.71)	0.52 (0.32 to 0.85)
Trend†			P<0.001	P<0.01
Relative fertility:
Low	145 (28)	156 (22)	1.98 (1.43 to 2.75)	2.13 (1.51 to 3.00)
Normal	260 (51)	389 (54)	1.00	1.00
High	109 (21)	175 (24)	1.22 (0.88 to 1.67)	1.42 (1.01 to 1.98)

^*Adjusted for cryptorchidism, testicular atrophy, characteristics described in table 3, sex with prostitutes, and sexually transmitted diseases. 

^†Test for linear trend in odds ratio over categories.