Table 2.

Risk factors for recurrent SCT.

		Univariable		Multivariable
	Recurrence rate	Odds ratio	P	Odds ratio	P
Altman classification
I	73 of 1036	1
II	122 of 1118	1.631 (1.203–2.211)	0.002*	1.624 (1.180–2.234)	0.003*
III	76 of 609	1.900 (1.353–2.668)	<0.001*	1.627 (1.227–2.348)	0.009
IV	63 of 548	1.696 (1.189–2.419)	0.004	1.423 (0.967–2.093)	0.073
Income country
Low	6 of 57	1
Lower-middle	33 of 377	0.996 (0.397–2.502)	0.994
Higher-middle	56 of 677	0.871 (0.357–2.121)	0.760
High	254 of 2296	1.076 (0.457–2.535)	0.867
Primary histology
Mature	155 of 2168	1
Immature	80 of 625	1.863 (1.3980–2.481)	<0.001*	1.911 (1.427–2.558)	<0.001*
Malignant	91 of 366	4.337 (3.245–5.795)	<0.001*	3.965 (2.906–5.411)	<0.001*
Median age at diagnosis (days)
Yes	1 (0–248.3)
No	0 (0-40)		0.254
Median age at resection (days)
Yes	17 (4–318)		0.073
No	13 (4–120)