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. Author manuscript; available in PMC: 2017 Dec 1.
Published in final edited form as: Clin Trials. 2016 Jun 30;13(6):612–620. doi: 10.1177/1740774516655101

Table 4.

Non-Compliance Reasons for Studies With the Poorest Compliance Rates

Study Refusal Category Frequency
N0949 Patient Refusal 9
Booklet (or correct booklet) not given to patient 23
At-home completed booklet not returned via mail 1
Unknown 1
N1031 Patient Refusal 18
Booklet (or correct booklet) not given to patient 4
At-home completed booklet not returned via mail 4