Table 1

Testicular relapse by time of first treatment (1972-7)

Period		Years		No of patients		No of boys		All events		Testis ± bone marrow
Period		Years		No of patients		No of boys		No	Observed/expected	No	Isolated	Observed/expected
1	1972-8	299	169	116	1.4		22	15	1.22
2	1979-82	216	122	67	1.0		18	12	1.19
3	1983-7	245	133	54	0.62		14	6	0.67
Total		760	424	237	p < 0.00004		54	33	p = 0.084