Table 1

Details of the final study sample size
Mail-outs and response rates
Total number of email addresses for mail-outs n = 12,005
Incorrect email addresses or out-of-office replies n = 3397
Mail-outs sent correctly n = 8608 100.0%
Completed questionnaires n = 1174 13.6%
Unfinished questionnaires (incompletely answered) n = 197 2.2%
Non-responders n = 7235

Schulz et al.

Schulz et al. BMC Musculoskeletal Disorders 2013 14:96   doi:10.1186/1471-2474-14-96

Open Data