Table 1. Key characteristics of the surveyed postdocs.

Different n are due to missing values (where participants did not provide information). Percentages are of valid cases.

	# of Postdocs fellowships	Duration of postdoc fellowship(s) (years)	# of total publications	# of publications during the postdoc fellowship(s)	Discipline	Age	Gender
	One        70.0%	≤1         21.3%	0             2.2%	0             33.1%	Biology                           43.6%	<30          9.5%	Female        55.1%
	Two        26.3%	2–4        50.0%	1–3         12.4%	1             19.7%	Neuroscience                  21.8%	30–39        78.3%	Male           44.9%
	Three        3.2%	5–8        24.1%	4–10        50.6%	2             10.7%	Medicine                        10.9%	40–49        11.5%
	Four         0.5%	>8           4.7%	>10           34.8%	3             14.0%	Engineering                      4.2%	>50          0.7%
				>4            22.5%	Chemistry                        3.0%
					Environmental science     1.2%
					Physics                           0.6%
					Mathematics                   0.6%
					Statistics                         0.6%
					Other                             13.5%
n	190	178	178	178	165	148	147
Min-Max	1–4	0.5–18	0–65	0–20	-	27–52	-
Mean	1.34	3.38	9.26	2.28	-	34.89	-