Table 1.

30-day mortality by 10-year age intervals throughout the study periods.

30-day mortality (%)	Period 1 March (n=810)	Period 2 April (n=504)	Period 3 May (n=67)	Period 4 June (n=22)	Period 5 July (n=77)	Period 6 August (n=91)	Period 7 September (n=74)	p
<40 y	1/90 (1%)	0/55 (0%)	0/9 (0%)	0/6 (0%)	0/14 (0%)	0/13 (0%)	0/7 (0%)	0•465
40–49 y	1/105 (1%)	0/62 (0%)	0/7 (0%)	0/0 (0%)	0/18 (0%)	0/12 (0%)	0/17 (0%)	0•474
50–59 y	6/155 (4%)	4/86 (5%)	0/7(0%)	0/4 (0%)	0/17(0%)	0/12(0%)	0/19(0%)	0•173
60–69 y	9/180 (5%)	8/90 (9%)	0/14 (0%)	0/2 (0%)	0/8 (0%)	0/25 (0%)	1/11 (9%)	0•482
70–79 y	38/186 (20%)	9/84 (11%)	2/10 (20%)	0/6 (0%)	1/11 (9%)	1/15 (7%)	0/11 (0%)	0•012
80–89 y	31/80 (39%)	22/94 (24%)	2/11 (18%)	0/3 (0%)	1/5 (20%)	2/12 (17%)	0/8 (0%)	0•005
>90 y	8/14 (57%)	9/33 (27%)	1/9 (11%)	0/1 (0%)	2/4 (50%)	0/2 (0%)	0/1 (0%)	0•133
All patients	94/810 (11•6%)	52/504 (10•3%)	5/67 (7•5%)	0/22 (0%)	4/77 (5•2%)	3/91 (3•3%)	1/74 (1•4%)	<0•001