Table 1

Description of sample response rates

No. of questionnaires sent out

6367

No. interviews completed and suitable for analysis

4993 (78%)

Interviews not completed or excluded from analysis because of:

Death

42

Not contactable (e.g. change of address)

742

Refusal

76

Excluded because of dementia

4

Excluded because of other serious psychiatric disease

46

Proxy interview only

82

Too many missing items on interview

386

Total interviews not completed or used in analysis

1378 (22%)


Yeh and Liu BMC Health Services Research 2003 3:9   doi:10.1186/1472-6963-3-9

Open Data