The phrase "a single grade of" is correct and usable in written English.
It can be used when referring to one specific level or category of something, often in contexts like education, quality, or classification.
Example: "The project was evaluated based on a single grade of excellence, which set a high standard for all future submissions."
Alternatives: "one level of" or "a specific category of".
Table 3 summarizes drug-related AEs reported in >1 subject; all were considered grade 1 in intensity with the exception of a single grade 2 worsening of depression that the investigator thought might be related to the investigational product.
Fourteen patients (33%) experienced proteinuria (all grades 1 or 2 except a single grade 3), none of whom had a history of renal disease.
Once on the north side of the canal, NY 250 crosses the CSX Transportation-owned Rochester and West Shore Subdivisions at a single grade crossing ahead of High Street.
The most striking result of the CARL pilot trial was the occurrence of a single grade 2 PPE during 57 cycles of PLD.
AUC with plasmapheresis was 50% (±3%) of the calculated AUC without plasmapheresis (figure 1B) The most remarkable result of the CARL pilot trial was the occurrence of a single grade 2 PPE event during 57 cycles of PLD (figure 2).
Several instruments exist, for example, the Franco-Italian glossary (Sinistrero et al, 1993), the RTOG/EORTC late radiation morbidity scoring schema (Rubin et al, 1995), the SOMA-LENT system (Mornex et al, 1997) and CTCAE (Trotti et al, 2003), but many of these combine multiple signs and symptoms into a single grade leading to loss of specificity.
Another problem with ranking evidence in a hierarchy is that different dimensions of quality get condensed into a single grade, resulting in a loss of information.
Anna Brychan, director of the National Association of Head Teachers Cymru, said a single grade could not represent the entirety of what a school does.
What happened, as M. R. Werner described in a Reporter at Large piece later that year, was the creation of a single grade, known as Approved Milk.
