Table 2.

Second primary cancers in the different age classes according to the treatment of the primary cancer

Systemic treatment of the first primary cancer
	Cytotoxics only		Cytotoxics and immunotherapy		Immunotherapy only		No cytotoxics, no immunotherapy		All patients
	n = 16 997	(%)	n = 1131	(%)	n = 32	(%)	n = 28 669	(%)	N = 46 829	(%)
Age at first cancer
<30	38/1436	2.6%	0/24	0.0%	0/5	0.0%	123/2597	4.7%	161/4062	4.0%
30-60	151/6737	2.2%	1/509	0.2%	0/14	0.0%	496/11 717	4.2%	648/18 977	3.4%
>60	248/8824	2.8%	5/598	0.8%	1/13	7.7%	767/14 355	5.3%	1021/23 790	4.3%
All	437/16 997	2.6%	6/1131	0.5%	1/32	3.1%	1386/28 669	4.8%	1830/46 829	3.9%