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Table 3 Median number of days between first participant enrolment and registration for retrospectively registered studies in the four journals publishing the largest number of clinical trials

From: When are clinical trials registered? An analysis of prospective versus retrospective registration

Journal

Median days to registration

Interquartile range

BMC Complementary and Alternative Medicine

491

448 to 1172

BMC Family Practice

418.5

139.5 to 676.25

BMC Pediatrics

745

243 to 1273

BMC Public Health

321.5

148.5 to 1239.25