Table 2:

Among participants with a doctorate for their highest quantitative degree, survey responses stratified by supervisor type

	Methodologist (N=122)	Other (N=39)	Fisher’s exact test p-value
Participant sex [non-missing N=120; N=39]
female	69 (57.5%)	21 (53.8%)	0.713
I am frequently given authorship when I feel I should be co-author
agree	105 (86.1%)	32 (82.1%)	0.606
My expertise as a statistician/methodologist is valued by the collaborators that I work with
agree	106 (86.9%)	32 (82.1%)	0.441
I have too many different projects to do each project well
agree	53 (43.4%)	18 (46.2%)	0.854
I am pressured to deliver specific analysis results related to the PIs hypotheses
agree	31 (25.4%)	14 (35.9%)	0.223
PIs respect and honor my ethical boundaries
agree	101 (82.8%)	29 (74.4%)	0.251
PIs collaborate with me early in research projects
agree	67 (54.9%)	21 (53.8%)	1.000
I am adequately informed of study progress
agree	67 (54.9%)	17 (43.6%)	0.270
I am provided ample calendar time to critically review all abstracts, posters, presentations, and manuscripts before deadlines
agree	47 (38.5%)	12 (30.8%)	0.448
I have sufficient time and effort available to critically review all abstracts, posters, presentations, and manuscripts before deadlines
agree	40 (32.8%)	13 (33.3%)	1.000
I am provided intellectual freedom to critically review all abstracts, posters, presentations, and manuscripts
agree	106 (86.9%)	30 (76.9%)	0.202
In disputes or disagreements with investigators, my supervisor will support me
agree	90 (73.8%)	31 (79.5%)	0.530
Project managers are available to support project workflow and administration
agree	58 (47.5%)	16 (41.0%)	0.580
PIs tell me which statistical tests they would like me to perform instead of asking for my expertise based on their hypotheses
always or often	10 (8.2%)	2 (5.1%)	0.732
PIs contact me with tight timelines that do not allow me to fully consider their hypotheses, determine or develop appropriate tests, or perform analyses well
always or often	30 (24.6%)	14 (35.9%)	0.215
My interactions with PIs are limited to brief advice and consultations so that they can do their own analyses
always or often	3 (2.5%)	1 (2.6%)	1.000
I work in collaboration with other statisticians/methodologists, statistics students, or statistical programmers on projects
always or often	75 (61.5%)	13 (33.3%)	0.003
Abstracts, presentations, and manuscripts have been submitted without my knowledge or review where the PI has used my name in the author block
always or often	9 (7.4%)	4 (10.3%)	0.518
On grant submissions where the PI is a health professional or basic scientist, I am listed as a Co-I or Co-PI?
always or often	75 (61.5%)	27 (69.2%)	0.448
The PI and I discuss effort/budgets and project expectations before grants are submitted
always or often	72 (59.0%)	28 (71.8%)	0.186
Grants are submitted without sufficiently budgeting for my effort
always or often	26 (21.3%)	10 (25.6%)	0.659
Do you take on grants with <5% annual effort?
always or often	12 (9.8%)	6 (15.4%)	0.383
The contribution of statisticians/methodologists as collaborative investigators are appropriately recognized
agree	68 (55.7%)	21 (53.8%)	0.855
The contribution of statisticians/methodologists as PIs or Co-PIs (when applicable) are appropriately recognized
agree	62 (50.8%)	19 (48.7%)	0.856
Do you have access to colleagues at your institution who you can ask statistical methodology questions? [N=115; N=34]
yes	114 (99.1%)	33 (97.1%)	0.405
Do you have access to colleagues at your institution who you can ask statistical programming questions [N=115; N=32]
yes	107 (93.0%)	30 (93.8%)	1.000
I would like to have more opportunities to pursue methodological research
agree	84 (68.9%)	20 (51.3%)	0.055
Opportunities exist to collaborate with other biostatisticians and methodologists on statistical and methodological research projects
always or often	47 (38.5%)	6 (15.4%)	0.010