The following data provides evidence of how many applications to every STP direct entry post, there were for each of the specialisms in 2020.
| Specialism | Number of applications to post |
| Andrology | 29.0 |
| Audiology | 6.4 |
| Cancer Genomics | 49.0 |
| Cardiac Science | 21.2 |
| Clinical Biochemistry | 26.7 |
| Clinical Bioinformatics (Genomics) | 14.6 |
| Clinical Bioinformatics (Health Informatics) | 7.3 |
| Clinical Bioinformatics (Physical Sciences) | 8.5 |
| Clinical Engineering | 14.5 |
| Clinical Immunology | 56.6 |
| Clinical Pharmaceutical Science | 18.3 |
| Critical Care Science | 4.9 |
| Gastrointestinal Physiology | 6.6 |
| Genomic Counselling | 28.8 |
| Genomics | 30.1 |
| Haematology and Transfusion Science | 77.0 |
| Histocompatibility and Immunogenetics | 35.5 |
| Medical Physics | 7.6 |
| Microbiology | 69.4 |
| Neurophysiology | 33.7 |
| Reproductive Science | 30.9 |
| Respiratory & Sleep Sciences | 14.8 |
| Urodynamic Science | 7.0 |
| Reconstructive Science | 9.0 |
| Ophthalmic and Vision Science | 7.7 |
| Vascular Science | 18.9 |