Table 3.

Relative standardised mortality ratios (SMR) with patients older than 89 years of age as a reference adjusted for gender and observation period

Age class	Relative SMR	Lower 95% confidence limit	Upper 95% confidence limit	P-value
< 70	9.16	4.71	17.79	< 0.001
70–74	1.37	0.76	2.46	0.290
75–79	1.10	0.73	1.64	0.656
80–84	1.39	1.06	1.84	0.023
85–89	1.39	1.09	1.79	0.009
> 89	Reference