Table 1. Key characteristics of the surveyed postdocs.

Different n are due to missing values. Percentages are of valid cases.

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