A randomised controlled trial to assess the effectiveness of offering study results as an incentive to increase response rates to postal questionnaires [ISRCTN26118436]

Table 2 Response rate to final follow up questionnaire

	Intervention	Control
Replied	721	233
Not replied	49	14
Total number of questionnaires analysed	770	247
Overall response rate	93.6%	94.3%

ISSN: 1471-2288