Table 2

Project duration (in months) by project characteristics (N=27)

Characteristic	Median (IQR) project duration (months)
Characteristic	Total	Development	Execution	Writing	Submission
Project type
Retrospective	17 (11–19)*	2 (<1–4)	2 (1–9)	2 (1–4)	3 (2–5)
Prospective	42 (24–42)*	5 (2–8)	20 (7–28)	9 (2–15)	4 (4–7)
Bench science or other	7 (5–24)*	6 (<1–12)	12 (1–23)	1 (1–2)	3 (<1–4)
Regulatory approval required
No	11 (5–19)†	<1 (<1–4)	1 (<1–3)†	2 (1–3)	3 (2–5)
Yes	20 (17–38)†	3 (2–5)	7 (2–26)†	2 (1–6)	4 (3–5)
External funding received
No	16 (9–20)‡	2 (<1–4)‡	2 (1–9)‡	2 (1–4)	3 (2–4)‡
Yes	38 (29–58)‡	9 (5–12)‡	25 (15–27)‡	1 (1–12)	7 (6–14)‡
Trainee participation
No	16 (5, 24)	<1 (<1–4)	2 (1, 7)	3 (1, 8)	2 (1, 4)
Yes	19 (11, 32)	2 (1, 4)	7 (2, 22)	2 (1, 4)	4 (3, 5)
Prior presentation
No	18 (10, 19)	3 (1, 4)	2 (1, 8)§	2 (1, 4)	3 (2, 5)
Yes	21 (11, 40)	2 (<1, 5)	7 (3, 26)§	2 (1, 4)	4 (3, 6)

*Statistically significant difference across project types (p<0.05) on Kruskal-Wallis test.
†Statistically significant difference according to need for regulatory approval (p<0.05) on rank-sum test.
‡Statistically significant difference according to receipt of external funding (p<0.05) on rank-sum test.
§Statistically significant difference according to prior presentation (p<0.05) on rank-sum test.