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Table A-13. Imputation for postdoctoral appointees in science, engineering, and health fields, by mechanism of support, citizenship, and type of doctoral degree: 2018

Mechanism of support All doctoral degree types Doctoral degree Professional degree Dual degree Doctoral degree type unknown
Imputation rate (%)
All postdoctoral appointees 3.5 6.5 3.9 4.4 3.8
Fellowships 17.6 17.5 7.7 23.4 24.4
Research grant 13.8 14.3 11.1 14.6 12.1
Traineeship 16.6 18.4 19.0 18.5 7.4
Other support 11.4 12.9 6.9 11.3 7.8
U.S. citizens and permanent residents 9.2 10.7 6.8 11.3 7.6
Foreign nationals with temporary visa 10.5 12.1 9.9 14.7 8.8
Number imputeda
All postdoctoral appointees 2,254 3,158 158 54 424
Fellowships 1,282 872 64 34 324
Research grant 5,265 4,282 127 76 802
Traineeship 633 455 110 20 49
Other support 1,775 1,422 105 50 195
U.S. citizens and permanent residents 2,711 2,266 156 61 432
Foreign nationals with temporary visa 3,704 3,296 177 100 480
a This table reports the sum of counts imputed in each of these cells and variables. Because some units report totals without complete details, the sum of the imputed details will often be higher than the related total.
NOTE: Doctoral degree includes PhD, ScD, DEng, etc.; professional degree includes MD, DVM, DO, DDS, etc.; dual degree includes both professional and doctoral degrees (MD-PhD, DVM-PhD, etc.).
SOURCE: National Center for Science and Engineering Statistics, Survey of Graduate Students and Postdoctorates in Science and Engineering, 2018.