Hi Thomas -
Welcome to the board. It's nice that you are showing concern for your friend who has struggled and are trying to do research on her behalf. Unfortunately there are cases where the belief system and problems within the organization have caused people, young and old, to take their lives. I have personally known several including my own father. Compared to the general population - that would be a tricky one to come up with numbers - JW's don't record statistics of that sort. Teen suicide is a big problem everywhere.
The religion, actually a cult, is very restrictive and many teens (& adults) find it a difficult regime to live under. I would first suggest that your friend seek profesional assistance for her ongoing struggles and not be led along the path of believing that JW's have all the answers for the world's problems to include mental, physical issues. We received constant training to convince people of this - but, you will find as you explore areas of this board, many are no longer choosing to live under the illusion. The incidence of emotional distress, depression, anxiety, panic attacks and other mental difficulties does abound within the membership and there are two thoughts on this: that people who struggle in those areas are DRAWN to the JW's and/or, they are created while within. We found the answer to those problems - we left, and all - are now WELL.
You are a wonderful friend to show such concern, and again, please urge your friend to seek guidance from a professional soon.
Warm regards,
4JWY