Table 2. Standardised incidence ratios (SIRs) of breast cancer by age group.

Age group	Observed (rate per 105)	Expected (rate per 105)	SIRs	95% CI	P-value
25–39	11 (42.9)	0.74 (2.9)	14.9	8.30–26.6	<0.0001
40–49	12 (50.0)	3.29 (13.7)	3.64	2.09–6.38	0.001
50–59	17 (97.7)	4.02 (23.1)	4.23	2.64–6.77	<0.0001
60 and above	25 (103.9)	8.44 (35.1)	2.96	2.01–4.37	<0.0001