Not even close to a stretch. This study is with adults, and not with an already fragile child dealing with trauma.
https://www.nami.org/Blogs/NAMI-Blog/March-2023/How-Solitary-Confinement-Contributes-to-the-Mental-Health-Crisis#:~:text=Among%20many%20other%20mental%20health,of%20an%20acute%20mental%20illness.
|Mental Illness And Solitary Confinement
Those with mental illness are overrepresented in solitary confinement, despite the vulnerability and threats to the mental health of those incarcerated. Research shows that the effects of solitary confinement on mental health are often fatal, both during and after incarceration. Half of all suicides in prisons and jails occur in solitary confinement. A recent study shows the long-lasting effects; that any amount of time spent in solitary increases the risk of death in the first year after release.
Individuals were overall 24% more likely to die in the first year after release, including from suicide (78% more likely) and homicide (54% more likely). They were also 127% more likely to die of an opioid overdose in the first two weeks after release.
Among many other mental health experts, Dr. Stuart Grassian, a psychiatrist, observed the devastating mental health consequences of the practice. Solitary confinement, he found, caused either (1) the exacerbation or recurrence of preexisting mental health issues, or (2) the onset of an acute mental illness. He is also credited for identifying a specific psychiatric syndrome associated with solitary confinement, termed the SHU Syndrome.