Table 1.
Relationship of matriculation period to number of pre- and postdoctoral publications, number and percentage of postdoctoral publications which are first-authored by the postdoctoral trainee, and primary research mentor impact factor (h-index) at the time of postdoctoral trainee matriculation
| Overall | Year of matriculation
|
Statistic | p | Post-hoc | ||||
|---|---|---|---|---|---|---|---|---|
| 1978–1987 | 1988–1997 | 1998–2007 | 2008–2013 | |||||
| n=134 | n=29 | n=42 | n=43 | n=20 | ||||
| # predoctoral publications (mean±S.D.) | 420 3.1±3.8 |
76 2.6±3.4 |
101 2.4±4.3 |
156 3.6±3.5 |
87 4.4±3.3 |
F(3,130)=1.698 | .171 | |
| # postdoctoral publications (mean±S.D.) | 337 2.5±2.4 |
55 1.9±1.9 |
80 1.9±2.0 |
118 2.6±2.3 |
84 4.2±3.0 |
F(3,130)=5.478 | .001 | 2008–2013>1978–1987, 1988–1997, 1998–2007 |
| # (%) 1st author | 140 (42 %) | 20 (36 %) | 36 (45 %) | 47 (40 %) | 37 (44 %) | Χ2 (3)=1.36 | .715 | |
| Mentor h-index | 25±16 | 19±12 | 27±18 | 26±16 | 29±20 | F(3,130)=1.782 | .154 | |