How many die because their parents refuse to get them treatment?
There's no way to know, because that would require proof that they died because their parents withheld treatment, and wouldn't have died otherwise. She died of complications of diabetes. Lots of people who are treated die of diabetes, too.
"The incidence of this condition may be increasing, and a 1 to 2 percent mortality rate has stubbornly persisted since the 1970s."
See, they die anyway. With treatment.
"Although protocols for the treatment of diabetic ketoacidosis are well established, a 1 to 2 percent mortality rate has persisted since the 1970s,5 emphasizing the need for careful, ongoing evaluation of this sometimes "routine" medical emergency."
Which is another way of saying, "they continue to die anyway, with medical treatment."
"Symptomatic cerebral edema occurs primarily in pediatric patients, particularly those with newly diagnosed diabetes. No single factor predictive for cerebral edema has yet been identified." Hmmm. Insulin doesn't prevent it. So although you can treat with insulin, they can (and do) still die from edema.
Insulin apparently causes heart disease, as well.
http://www.aafp.org/afp/990800ap/455.html
Lest we forget, the "cure" can result in death as well:
"Acute pulmonary edema is potentially related to aggressive or excessive fluid therapy. Although initial aggressive fluid replacement is necessary in all patients, particular care must be taken in those with comorbidities such as renal failure or congestive heart failure." Oops. Wonder if the doctors would be charged with murder?
http://www.emedicine.com/EMERG/topic135.htm
People have the right to make their own choices about their health care, and their children's health care. Provided they aren't setting out deliberately to kill the kids, and the treatment isn't in and of itself dangerous.