Table 2.

Patient characteristics

Pat nr.	Sex	Age, years	Hospital
1	m	75	A
2	f	87	A
3	m	75	A
4	f	66	A
5	m	65	B
6	m	73	B
7	f	71	B
8	f	61	B
9	m	74	C
10	f	69	C
11	m	52	C
12	m	65	D
13	f	71	D
14	m	79	D
15	m	74	E

f female, m male, Pat nr patient number