How Many Researchers Were Supported by NIH as Trainees?

Earlier this year we reported on the unique numbers of research project grant (RPG) awardees and applicants each year since the end of the NIH doubling, in 2003. We described how the number of unique RPG awardees has remained relatively constant, while the number of applicants (as assessed over 5-year windows) has steadily and markedly increased.
A number of readers asked us about the prior NIH-supported research training and career development of these investigators. Among RPG awardees, what proportion had received prior fellowship, training, or career development (F, T, or K) awards? And perhaps of greater interest, among unsuccessful, unfunded applicants, what proportion had received prior fellowship, training or career awards?
To answer these questions, we start with a quick recap. …. Continue reading