I have nothing specific but I can give you guidelines based on my opinion/general observation.
The lowest undergrad GPA I've heard that anyone in the program had in the past three years is a 3.3 Overall GPA. I would suggest at least a 3.3 science GPA. GPA is the biggest factor.
GRE is not that important, as long as you get at least 50th percentile in the two big categories and a 4 on the writing section you should be fine, but if you kill the GRE it might look good.
Majors vary from English to Exercise Science to Biology to Psychology to Dance, so that's not critical.
If you're an Engineering major you should know your odds of getting in probably go up a lot, but I don't know of anyone in the program who has that major (so you know people with those majors don't usually apply). Honestly if you're an Engineering major with a sub 3.0 GPA (maybe as low as 2.6 overall), then I still think you have a really good shot. Anyone who knows the amount of work required to earn any Engineering degree knows that they are the most demanding undergrad majors. This rule does not apply to any other major.
Volunteer experience is varied from people who have worked as aids for a while to people who did close to the bare minimum required.
CSI graduates, especially the ones in the Macaulay Honors College and The Verrazano School, are definitely going in with an advantage (schools usually prefer their own undergrads, that is just a fact you have to deal with). 8 out of 20 students, 40%, in my class are CSI grads. That number is not fixed but it gives you an idea if you're calculating your odds.
Maybe if you went to Harvard, MIT, or Columbia you might have an edge, but I don't know anyone in the CSI PT program who got an undergrad degree from a program on that level.
Schools represented for the class of 2017 include: Brooklyn College, Buffalo, CSI, Florida State, Georgian Court, Hofstra, LIU, Penn State, Touro, Utica, and Wagner.
There are classes that were older on average and classes that are young on average. Age is not an advantage/disadvantage.
Working as a PT aid will probably look good on an application because everyone in PT knows that aids are usually underpaid relative to the amount of work they do. Work experience of students vary from bartender to PT aid to waitress to professor to no job. Having no work experience is definitely not an advantage. Think about what looks like a demanding job (in terms of work load) and that's likely something that is a plus.
Go to the open house and find out what type of students are in each class, take a look at the pictures of the recent classes. Get an idea of who traditionally gets in, ask yourself: are you one of those people? There are wild cards but admissions people usually have MOs.
To sum it all up: GPA is the biggest factor, they are looking at your work ethic (make sure to have an application that makes it clear you have a good one), GRE isn't that big of a deal, your undergrad college isn't a major point of emphasis (unless you went to CSI), and age doesn't matter
