The phrase "a persistent course" is correct and usable in written English.
It can be used to describe a continuous or unchanging path or direction in various contexts, such as behavior, strategy, or action.
Example: "Despite the challenges, the team maintained a persistent course towards their goal of completing the project on time."
Alternatives: "an unwavering path" or "a steady trajectory."
People at higher risk of chronic depression may require longer treatments to avoid a persistent course of disability.
Moreover, this study indicates that patients with personality disorders have difficulty in negotiating treatments, which may be a factor that contributes to a persistent course.
Since parental psychopathology like alcohol abuse or an antisocial personality disorder are among the most relevant risk factors for a persistent course of conduct disorder [ 9], an intervention has to target not only the children with behavioural problems but also their parents.
During extended follow-up, women with a combination of fatigue and psychological disorder ran a more persistent course than either those with psychological disorder alone or those with fatigue alone.
Our findings suggest that the DRD4 7-repeat allele is associated with a more persistent course of ADHD.
Generally, summary outcomes are easy to interpret and give clinically meaningful estimates, and summarizing weekly data may indeed distinguish patients with a more persistent course.
Altogether the present data from two observational cohorts indicate that the IL2RA minor allele is not only protective for the severity of radiographic progression but also predisposes to a less persistent course of RA.
It found that there was a "varied and persistent" course over 30 months and a low rate of recovery (Herzog, Hopkins, & Burns, 1993).
"There is no case in which such a long and persistent course of manufacture of both guns and explosives combined with possession of material likely to be useful to those who commit terrorist acts has ever been before a court before".
The PPV for having a persistent disease course gradually increased with higher cut-off values (Table 8).
Even with adequate antipsychotic treatment, many patients with schizophrenia continue to experience symptoms: according to the W-SOHO study, 15 39% experience a persistent symptomatic course and 14 21% of those experiencing remission subsequently relapse within a three-year period [ 5].
