Yes, will be left alone immediately, as opposed to being left alone at a later time.

saludos!

another option

this is a questionnaire on what the elderly are thinking may happen to them, unless they have the wheelchair ready it won't be immediately

in a near future

They are going to leave the issue alone, right away, or from this moment on (until circumstances require intervention again).

The fear that someone is going to either abandon them outright or place them in a home.

Just a thought.

This is the Roget Thesaurus's best alternative for "immediately" in in this type of context. Examples with "abandoned":

She pretty much abandoned the idea on the spot, because when directed at any actual human being, it’s obviously ridiculous. Her easy capitulation was ...
www.pandasthumb.org/archives/2006/06/from-darwin-to-1.html

by Michael Eliot Howard, Michael Howard - 2006 - Biography & Autobiography - 221 pages
I got the message, and abandoned the idea on the spot. I doubt whether it would have made the slightest difference to my reputation if.
books.google.com/books?isbn=0826491251.

It was such a dismal and dreary place they abandoned the idea on the spot. I think I read that in a Neworder article - can anyone confirm this? ...
www.xmission.com/pub/lists/kraftwerk/archive/v03.n128

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Note added at 14 hrs (2008-11-10 08:09:03 GMT)
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DSM-IV (American Psychiatric Association, 1994) criteria for .... Delusion of abandonment. 0.29. 0.58. 23.8. 5.
journals.cambridge.org/production/action/cjoGetFulltext?fulltextid

This is about a delusion in which that the person believes he/she is going to be literally ABANDONED. It's not about being "left alone" or anything mild like that. That's why it needs the dramatic emphasis of "on the spot."

I couldn't find a "delusion of abandonment" in the DSM, but here is a similar condition that focuses more on efforts to avoid abandonment:

DSM IV Borderline Personality Disorder & Abandonment

The first criteria in the DSM IV for a diagnosis for borderline personality disorder (emotional regulation disorder) is:

"frantic efforts to avoid real or imagined abandonment. Note: Do not include suicidal or self-mutilating behavior covered in Criterion 5 "

Under "Diagnostic Features," the DSM IV says "The perception of impending separation or rejection, or the loss of external structure, can lead to profound changes in self-image, affect, cognition, and behavior. These individuals are very sensitive to environmental circumstances. They experience intense abandonment fears and inappropriate anger even when faced with a realistic time-limited separation or when there are unavoidable changes in plans (e.g., sudden despair in reaction to a clinician's announcing the end of the hour; panic or fury when someone important to them is just a few minutes late or must cancel an appointment). they may believe that this "abandonment" implies they are "bad." These abandonment fears are related to an intolerance of being alone and a need to have other people with them. Their frantic efforts to avoid abandonment may include impulsive actions such as self-mutilating or suicidal behaviors..."

... is very accurate, you could also use: right away