Both anorexia and bulimia increase the risk of death. In the developed world binge eating disorder affects about 1.6% of women and 0.8% of men in a given year. Anorexia affects about 0.4% and bulimia affects about 1.3% of young women in a given year.
If you are insisting that on average a page is 500 words or 4,000 words the equivalent of 8 pages. By simple math you saying the average book is 80,000-120,000 words, would mean on average a novel is 160-240 pages. These would be classified as short novels or more so novels for older kids or younger teens.
some publishers especially in genres like romance have requirements as uniform as a muffin tin each manuscript will be long enough to fill a book of exactly so many pages others are far more flexible in the days of the typewriter a double spaced page with 1 inch margins would hold an average of 250 words so you could assume that since 4 pages 1000 words 240 pages 60000 words which was the typical length for most mainstream and mystery novels