Table 5.

Comparison of survival between participants in the cohort and non-participants*

Estimated cumulative survival probabilities by year from diagnosis (95% CI)
	Non-participants	BRIGHTLIGHT cohort
1 year	0.98 (0.97 to 0.98)	0.98 (0.97 to 0.99)
2 years	0.95 (0.94 to 0.96)	0.92 (0.91 to 0.94)
3 years	0.93 (0.92 to 0.94)	0.89 (0.87 to 0.91)
4 years	0.92 (0.91 to 0.93)	0.88 (0.85 to 0.90)

Log rank test p value <0.0001.

*Non-participants were young people diagnosed in the same time frame as the BRIGHTLIGHT cohort identified by the National Cancer Registration and Analysis Service who were not part of BRIGHTLIGHT.