The phrase "a trained assistant" is correct and usable in written English.
You can use it to refer to someone who has received specific training to assist in a particular task or role.
Example: "The project requires a trained assistant to help manage the logistics and ensure everything runs smoothly."
Alternatives: "a qualified aide" or "an experienced helper."
Urban residency increased the probability of having a delivery assisted by a trained assistant compared to rural residency (OR=2.1, CI= 1.5-2.9 1.5-2.9
Furthermore, the richer a woman the more likely that she would have delivery assisted by a trained assistant (OR=8.2, 4.2-16.0, OR for the richest in comparison to the poorest).
At Pannaipatti, as the midday sun beat down on a recent day, 22 children 1 to 3 years old were in the care of a teacher and a trained assistant, who work 9 a.m. to 3 p.m. six days a week, playing, singing, telling stories and ensuring that children eat a lunch of sprouted green gram, lentils and rice.
Some of these enhancements can be done by the system developers, while others demand active cooperation between the final user and the developers (or a trained assistant).
Details regarding the trial were explained to the mother by a trained assistant, who also asked the mother if she had any questions about the study.
A trained assistant then read the transcripts and independently came up with a coding framework.
The older a woman, the more likely that she would have a delivery assisted by trained assistant.
Interviews were conducted individually with the assistance of a trained field assistant.
The investigator and a trained research assistant were available to assist patients with limited computer literacy.
Under the corresponding author's supervision, the retrieved data were entered by a trained research assistant and verified by another trained research assistant for accuracy.
A trained research assistant introduced the study and at least two research assistants were available in the classroom to answer the children's questions during administration.
