Table 2

Sample attrition at different steps of the study in non-demented patients.

Cases n = 205

Controls n = 200

Non-demented at admission

127 (62%)

180 (90%)

Death during admission

22

7

Death during the next three months after discharge

8

10

Lost follow up

38

47

Analysed^*

59

116

^* Surviving non-demented cases with completed examination.

Barba et al. BMC Geriatrics 2002 2:2   doi:10.1186/1471-2318-2-2