Table 1b. New O patients switching to I, by sex, age group and year of starting O (percent and overall proportion).

	New patients in 2002		New patients in 2003
Age group	Male (%)	Female (%	Male (%)	Female (%)
<50	46	46	53	55
50–59	45	37	43	41
60–69	45	36	42	37
70–79	34	30	29	24
⩾80	25	0	100	18
Overall	40 (276/697)		40 (401/1 009)

I, irinotecan; O, oxaliplatin.