Exploring factors associated with views on sharing of certain interim trial result measures by the data safety monitoring board (DSMB) with non-DSMB members

Table 1 Summary of demographic factors

Number of trials in which respondent has been involved ^a
Number of trials	n (%)
≤ 15 trials	72 (19.4)
> 15 trials	131 (35.3)
Unknown^A	168 (45.3)
Number of trials the respondent has been involved with that had a DSMB monitoring the trial ^b
Number of trials	n (%)
≤ 15 trials	109 (29.4)
> 15 trials	88 (23.7)
Unknown^B	174 (46.9)
Number of trials the respondent has been involved with that had some form of private industry sponsorship ^c
Number of trials	n (%)
≤ 15 trials	137 (36.9)
> 15 trials	64 (17.3)
Unknown^C	170 (45.8)
Primary profession by training ^d
Main profession	n (%)
Mathematician/statistician/biostatistician	156 (42.0)
Methodological scientist/research methodologist	21 (5.7)
Other	26 (7.0)
Unknown^D	168 (45.3)
Usual work setting of respondents ^e
Place of work	n (%)
University or academic institution	123 (33.2)
Private or contracted research company	28 (7.5)
Other	51 (13.7)
Unknown^E	169 (46.0)

^aTotal of 203 responses to this question, percentages are based on a total of 371 respondents to the survey. ^AUnknown because 168 respondents did not answer this question
^bTotal of 197 responses to this question, percentages are based on a total of 371 respondents to the survey. ^BUnknown because 174 respondents did not answer this question
^cTotal of 201 responses to this question, percentages are based on a total of 371 respondents to the survey. ^CUnknown because 170 respondents did not answer this question
^dTotal of 203 responses to this question, percentages are based on a total of 371 respondents to the survey. ^DUnknown because 168 respondents did not answer this question
^eTotal of 202 responses to this question. ^EUnknown because 169 respondents did not answer this question

ISSN: 1745-6215