Table 4.

Standardised incidence ratios for quintiles of the final 10-year and full-lifetime risk prediction scores compared with population incidence rates in the full dataset

Risk score	SIR	95% CI	P value*
Final 10-year risk
Quintile 1 (median = 0.16%)	0.439	0.167–0.712	0.009
Quintile 2 (median  =  0.25%)	0.636	0.351–0.920	0.05
Quintile 3 (median = 0.34%)	0.670	0.438–0.962	0.06
Quintile 4 (median = 0.44%)	1.007	0.716–1.299	1.0
Quintile 5 (median = 0.62%)	1.395	1.094–1.697	0.003
Final full-lifetime risk
Quintile 1 (median = 1.20%)	0.337	0.142–0.532	<0.001
Quintile 2 (median = 1.54%)	0.745	0.464–1.026	0.1
Quintile 3 (median = 1.83%)	0.862	0.567–1.157	0.4
Quintile 4 (median = 2.19%)	0.983	0.688–1.277	0.9
Quintile 5 (median = 2.84%)	1.527	1.187–1.866	<0.001

CI, confidence interval; SIR, standardised incidence ratio. The SIR is the observed number of ovarian cancer cases divided by the number expected by the population incidence rates.

^*P value for test that SIR = 1.