Comparing glucose and hemoglobin A1c diagnostic tests among a high metabolic risk Hispanic population

BACKGROUND

Compare glycated hemoglobin (HbA1c ) diagnostic tests for prediabetes and diabetes with plasma glucose criteria and compare the metabolic profiles of people classified by HbA1c versus by glucose levels.

METHODS

Participants were recruited for the San Juan Overweight Adults Longitudinal Study. The participants were primarily Hispanic (98%), without previously diagnosed diabetes, and aged 40 to 65 years. Participants classified as normal glycemic, prediabetes, or diabetes on the basis of baseline HbA1c and plasma glucose criteria were compared with respect to baseline cardiometabolic factors.

RESULTS

The 1342 participants had a mean age of 50.5 ± 6.8 years and 28% were men. Thirty-one percent were diagnosed with prediabetes by plasma glucose criteria and 53.4% by HbA1c , and 8.1% were diagnosed with diabetes by plasma glucose criteria and 6.3% by HbA1c ; overall concordance rate was 55.1%. The area under the receiver operating characteristic curve of HbA1c compared to plasma glucose criteria was 0.62 for impaired glucose and 0.76 for diabetes. A worse cardiometabolic profile was seen within subgroups that met HbA1c and plasma glucose criteria for diabetes or prediabetes. Those diagnosed with prediabetes by plasma glucose criteria had significantly higher systolic blood pressure and higher homeostatic model assessment than those diagnosed using HbA1c . Participants diagnosed with diabetes by plasma glucose criteria had lower body mass index, smaller waist circumference, and lower insulinogenic and disposition indices, but higher homeostatic model assessment of insulin resistance, than those diagnosed by HbA1c .

CONCLUSIONS

Low concordance was seen between HbA1c and glucose measurements. The HbA1c is not a good test for prediabetes but shows reasonable validity for diabetes in this high-risk predominantly female Hispanic population. People classified by HbA1c , plasma glucose criteria, or both show different metabolic profiles; a combined test may be ideal.

Quality of life-in patients with differentiated thyroid cancer at the general endocrinology clinics of the University Hospital of Puerto Rico

Differentiated thyroid cancer (DTC) can compromise the quality of life of patients. Our purpose is to investigate if the quality of life, in a cohort of patients in Puerto Rico, is affected by the diagnosis and/or treatment modalities received for DTC.

METHODS

This is a cross-sectional study of 75 subjects with DTC. A Spanish version of the University of Washington Quality of Life Questionnaire was used, including multiple aspects of physical and social functioning. Descriptive and bivariate analysis between domain scores and variables of interest were performed.

RESULTS

82.7% of the patients reported that their health was the same or better than it was before treatment. The mean composite score obtained was 82.3, reflecting an overall little effect on quality of life. Patients diagnosed with DTC at an age of > or =45 years reported a significantly better score on the pain domain when compared with those diagnosed earlier (p < 0.05). Patient who received >150 mCi of radioiodine had a tendency towards a worse score on the same domain (p = 0.05).

CONCLUSIONS

Our cohort reported an overall minimal effect on the quality of life of patients with DTC. Future treatment strategies should include periodic quality of life evaluations, in order to tailor therapy in this growing population.