When Chloe Powell started begging for one more drink of water every night, her father, Charles, thought his then 7-year-old was using a common bedtime stall tactic. "I was irritated that she wouldn't go to sleep," admits Dr. Powell, who's a family physician in Dallas. With all she was drinking, he wasn't surprised when she began wetting the bed. But when Chloe couldn't make it through a conversation without having to use the bathroom, he became concerned. "I figured she had a urinary-tract infection, and she'd take some antibiotics and feel better," says Dr. Powell. He wasn't at all prepared for what his daughter's urine test showed: a dangerously high level of sugar that was a clear indicator of type 1 diabetes. In an instant, Chloe, now 10, went from being a kid who never thought twice about the foods she ate or the energy she burned to one who'd face a lifetime of carbohydrate counting, finger pricks, and insulin injections.
A Disease on the Rise
Type 1 diabetes is an autoimmune disorder that causes the body's immune system to mistakenly destroy healthy cells in the pancreas that produce the hormone insulin. (Type 2, on the other hand, occurs when the body doesn't respond to the insulin that's being made.) Insulin ensures that sugar (glucose) in the bloodstream gets into the body's cells where it's needed for energy; without insulin, sugar builds up in the blood, which can be deadly. It's important to begin insulin therapy as soon as possible because high blood-sugar levels can cause permanent vision and nerve problems as well as damage to blood vessels, increasing the risk of heart attack, stroke, and kidney disease.
Since the 1980s, the number of kids being diagnosed with type 1 diabetes has gradually crept up at a rate of about 3 to 5 percent per year. That may not sound like much, but it's startling when you consider that twice as many kids are diagnosed with type 1 diabetes today than were diagnosed 20 to 25 years ago. Although the condition can develop at any age, "we're seeing it at younger ages than ever before and more toddlers and preschoolers are being diagnosed," says Parents advisor Lori Laffel, M.D., chief of the pediatric, adolescent, and young adult section at Harvard Medical School's Joslin Diabetes Center. Experts believe that environmental factors like children's reduced exposure to germs may be partly to blame (a theory known as the hygiene hypothesis). "Reduced exposure to early-childhood infections may also alter certain children's immune response, leading to the autoimmune attack on the body's insulin-producing beta cells," says Dr. Laffel. "It could also be that excessive childhood weight may add other stresses to beta cells."
Why some kids get type 1 diabetes is also a mystery. White children and those with a family history of type 1 diabetes are most at risk, but only about 10 percent of those with type 1 diabetes have a family history of the disease. Sometimes, a child develops diabetes after being exposed to a virus like the ones that cause mono (Epstein-Barr) or hand-foot-mouth disease (which includes viruses such as Coxsackie).
Signs of High Blood Sugar
Chloe's unquenchable thirst and frequent urination were classic signs of type 1 diabetes. "Yet even though I'm a doctor, I missed the symptoms in my own daughter," Dr. Powell says. Other symptoms -- including increased appetite, weight loss, lethargy, and irritability -- are easily dismissed as kid quirks or chalked up to growth spurts. "Symptoms come on suddenly and can seem obvious after a child's been diagnosed," says Larry Deeb, M.D., past-president of the American Diabetes Association and director of Tallahassee Memorial HealthCare's Diabetes Center, in Florida. "Parents often say their child wasn't herself for weeks, but they couldn't pinpoint why."
Although blood tests are the most reliable way to diagnose diabetes, your child's doctor may first order a glucose urine test because it's easier to have a kid pee into a cup than to draw her blood. If there's sugar in her urine, a random blood-glucose test (one that doesn't require fasting) can confirm the diagnosis, usually while you're still at the doctor's office. A blood-glucose reading of 200 milligrams per deciliter (mg/dL) or higher indicates your child has diabetes and will need to be given insulin multiple times every day to help her body process glucose. Fortunately, there have been great advancements in managing this lifelong affliction.