Here's a link to an article that discusses the results of a study measuring mortality in dialysis patients, according to the type of center (large chain, for profit, non-profit...etc). I'm going to have to look at the details of the study, because I want to know how Davita and Satellite fared in the study-- though I can guess at the outcomes from those two. They are like night and day.
I also wouldn't be surprised to find out that small for-profit center kill off more patients. I speak from experience. Ok, well, I wasn't killed off-- but gee, there were some questionable practices at the private, for-profit center where I first received dialysis. Things were so bad at that center that it's a wonder I decided to continue on with dialysis (I did decide to switch centers after three months, so that I could do home dialysis).
Anyway...here's the link to the article-- http://www.renalbusiness.com/news/2010/12/mortality-higher-in-large-chain-dialysis-clinics.aspx