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Sunday 7 December 2014

Screening for Type 1 Diabetes and Type 2 Diabetes

Type 1 Diabetes



CONSEQUENCES


Before diagnosis with type 1 diabetes, a teen with elevated blood glucose levels will develop symptoms of increased urination, thirst, and appetite in addition to weight loss or failure to grow normally. If not diagnosed soon enough, life-threatening ketoacidosis may result.

After diagnosis with type 1 diabetes, the teen must follow a daily management regimen that includes regularly scheduled insulin injections, blood glucose monitoring, and attention to food intake (especially carbohydrates) that adds stress to many families. Families must receive comprehensive education, diabetes self-management training, frequent follow-up, and social support on an on-going basis. The burden of living with a chronic illness is a consequence that is often overlooked.

Consequences occur with administration of too much or not enough insulin. Too much insulin or inadequate food intake may lead to low blood glucose levels (hypoglycemia) and potentially, loss of consciousness and seizures. Chronic hyperglycemia, a reflection of insufficient insulin, results in eye disease, kidney disease, nerve damage, and an increased risk of cardiovascular disease that may appear 10-15 years after diagnosis.


Type 2 Diabetes

Before diagnosis with type 2 diabetes, a teen with elevated blood glucose levels may present with no symptoms or have mild glucosuria and/or ketosis with or without weight loss.

After diagnosis with type 2 diabetes, the teen must follow a daily management regimen that includes attention to food intake (carbohydrates, as well as fats and total energy intake), exercise, and blood glucose monitoring. Administration of medication (insulin or oral medications) may also be required. This new regimen may add stress to families. Families must receive comprehensive education, diabetes self-management training, frequent follow-up, and social support on an on-going basis. The burden of living with a chronic illness is a consequence that is often overlooked.

Acute consequences will depend on the medication prescribed. Those teens treated with insulin or sulfonylureas are at risk for low blood glucose levels.

Long term consequences are similar to those resulting from poor control of type 1 diabetes– eye disease, kidney disease, nerve damage and an increased risk of cardiovascular disease.


SCREENING


Early Warning Signs for Type 1 and Type 2 Diabetes
A blood glucose level should be checked if one or more of these symptoms is present:

         Increased urination
         Increased thirst
         Increased appetite
         Unexplained weight loss


Screening for Type 1 Diabetes

         No screening recommendations for the diagnosis of type 1 diabetes in adolescents have been established.



Screening for Type 2 Diabetes

The screening recommendations listed in Table 2 are from the American Diabetes Association.







Criteria*


TABLE 2
Testing for Type 2 Diabetes in Children and Adolescents


Overweight (BMI 85th percentile for age and gender, weight for height 85th percentile or weight
120% of ideal for height).

Plus any two of the following risk factors:

        Family history of type 2 diabetes in first- or second degree relative
        Race/ethnicity (American Indian, African American, Hispanic, Asian/Pacific Islander)
        Signs of insulin resistance or conditions associated with insulin resistance (acanthosis nigricans, hypertension, dyslipidemia, polycystic ovary syndrome)
Age of initiation: age 10 years or at onset of puberty if puberty occurs at a younger age.

Frequency: every 2 years.

Test: fasting plasma glucose is the preferred method for screening.

*Clinical judgment should be used to test for diabetes in high-risk patients who do not meet these criteria.

Source: © 2002 American Diabetes Association. From Standards of medical care for patients with diabetes mellitus. Diabetes Care 2002;25(1):213-229; Table 4, p. 215. Reprinted with permission from The American Diabetes Association.


ASSESSMENT


A nutrition assessment should be done at diagnosis and at least once a year thereafter by a registered dietitian experienced with diabetes and adolescent nutrition. The assessment includes an evaluation of typical food intake and eating habits in addition to identifying the many factors that influence food intake (Table 3). A 24-hour dietary recall and an age appropriate nutrition questionnaire are useful tools to obtain this information (see Chapter 4). Then an initial meal plan can be determined and adjustments in total energy intake may be made to allow for stage of growth and activity level. Information about family support and barriers to learning will help the dietitian individualize the educational experience.

TABLE 3
Factors that Influence Adolescent Food Intake



School schedule Work schedule Social activities
Weekday vs. weekend routines


Family culture Family traditions Food likes/dislikes
Places where meals are eaten


Financial resources
Family and/or peer support



         Use body mass index to assess physical growth (see Chapter 4). A teen with weight loss prior to diagnosis often needs additional calories for catch-up growth. Once healthy weight gain has occurred, it is important to check the meal plan 3-4 weeks after diagnosis and decrease total food intake, if necessary, to prevent excess caloric intake and unwanted weight gain.


         Total energy and protein requirements can be estimated by a combination of typical food intake and the Recommended Dietary Allowances. Adolescent energy and protein intake is often calculated by height to allow for changes in energy requirements related to growth during puberty rather than chronological age.

TO BE CONTINEU

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