User Profile Field : Edit ?

[Suri.CMS]

Hi All,
I created a User Profile Field that needs to be filled up by members during registration.

Now, if I EDIT that User Profile field (Lets say, I changed the text of one of the options), will anything happen to the values already chosen by my existing users ?

I mean, will there be any data loss ?

For example, lets say, I have a Single-Selection Radio Button field with below values.

What is your location ?

1) USA
2) EUROPE

Now, if I change it to:

1) UNITED STATES
2) EUROPE

Now, will anything happen to the data of my existing members who have chosen USA when they registered ?

Please clarify.

And where can I get detailed information on User Profile Fields ?