Joseph Monsur

Correlation of same-visit HbA1c test with laboratory-based measurements: A MetroNet study

BackgroundGlycated hemoglobin (HbA1c) results vary by analytical method. Use of same-visit HbA1c testing methodology holds the promise of more efficient patient care, and improved diabetes management. Our objective was to test the feasibility of introducing a same-visit HbA1c methodology into busy family practice centers (FPC) and to calculate the correlation between the same-visit HbA1c test and the laboratory method that the clinical site was currently using for HbA1c testing.MethodsConsecutive diabetic patients 18 years of age and older having blood samples drawn for routine laboratory analysis of HbA1c were asked to provide a capillary blood sample for same-visit testing with the BIO-RAD Micromat II. We compared the results of the same-visit test to three different laboratory methods (one FPC used two different laboratories).Results147 paired samples were available for analysis (73 from one FPC; 74 from the other). The Pearson correlation of Micromat II and ion-exchange HPLC was 0.713 (p < 0.001). The Micromat II mean HbA1c was 6.91%, which was lower than the 7.23% from the ion-exchange HPLC analysis (p < 0.001). The correlation of Micromat II with boronate-affinity HPLC was 0.773 (p < 0.001); Micromat II mean HbA1c 6.44%, boronate-affinity HPLC mean 7.71% (p < 0.001). Correlation coefficient for Micromat II and immuno-turbidimetric analysis was 0.927 (p < 0.001); Micromat II mean HbA1c was 7.15% and mean HbA1c from the immuno-turbidimetric analysis was 7.99% (p = 0.002). Medical staff found the same-visit measurement difficult to perform due to the amount of dedicated time required for the test.ConclusionFor each of the laboratory methods, the correlation coefficient was lower than the 0.96 reported by the manufacturer. This might be due to variability introduced by the multiple users of the Micromat II machine. The mean HbA1c results were also consistently lower than those obtained from laboratory analysis. Additionally, the amount of dedicated time required to perform the assay may limit its usefulness in a busy clinical practice. Before introducing a same-visit HbA1c methodology, clinicians should compare the rapid results to their current method of analysis.

Effect of Antibiotics on Vulvovaginal Candidiasis: A MetroNet Study

Purpose: Vulvovaginal candidiasis (VVC) is believed common after systemic antibiotic therapy, yet few studies demonstrate this association. In this pilot study, we evaluate the effect of short-course oral antibiotic use on VVC. Methods: Nonpregnant women aged 18 to 64 years who required ≥3 days oral antibiotics for nongynecological diseases were recruited from a family medicine office. Age-matched (±5 years) women seen in the same clinic for noninfectious problems were recruited as controls. The main outcomes are incidence of symptomatic VVC and prevalence of positive vaginal Candida culture 4 to 6 weeks after antibiotics. Results: Eighty (44 in antibiotic group) women were recruited; 14 of 79 (95% CI, 0.11–0.28) had asymptomatic vaginal Candida cultures positive at baseline. During follow-up, 10 of 27 (95% CI, 0.22–0.56) women in antibiotic group were Candida culture positive. In contrast, 3 of 27 (95% CI, 0.04–0.28) women in the control group were Candida culture positive (relative risk, 3.33; P = .03). Meanwhile, 6 of 27 (95% CI, 0.11–0.41) women in antibiotic group developed symptomatic VVC whereas none (95% CI, 0–0.12) of the women in the control group developed vaginal symptoms (relative risk, ∞; P = .02). Baseline Candida culture did not predict subsequent symptomatic VVC after antibiotics. Conclusion: In this pilot study, the use of short courses of oral antibiotics seems to increase prevalence of asymptomatic vaginal Candida colonization and incidence of symptomatic VVC. Larger cohort studies are needed to confirm these findings.

Racial Similarities in Response to Standardized Offer of Influenza Vaccination

AbstractBACKGROUND: Despite known benefits of influenza vaccination and coverage by Medicare Part B, elderly minority patients are less likely to receive influenza vaccination than whites. OBJECTIVES: To test whether a nonphysician-initiated standardized offer of influenza vaccination to all elderly primary care patients would result in similar proportions of African-American and white patients accepting vaccine. DESIGN: In 7 metropolitan Detroit primary care practices during the 2003 influenza vaccination season, medical assistants assessed influenza immunization status of all patients 65 years and older and collected limited demographic data. Eligible patients were offered vaccination. MEASUREMENTS: Proportion of patients accepting influenza vaccination by race and predictors of vaccine acceptance. RESULTS: Four hundred and fifty-four eligible patients with complete racial information were enrolled: 40% African American, 52% white, 8% other race/ethnicity. Similar proportions of African Americans and whites had already received the 2003 vaccine (11.6% and 11.0%, respectively) or stated vaccination as the reason for visit (23.8% and 30.5%, respectively). Among the remainder, there also were similar proportions who accepted vaccination: 68.9% white and 62.1% African-American patients. History of previous vaccination was the only statistically significant predictor of vaccine acceptance (odds ratio [OR] 8.64, 95% confidence interval [CI] 4.17, 17.91, P<.001). After adjusting for history of previous vaccination, age, gender, and education, the odds of vaccine acceptance were no different for whites and African Americans (OR 1.20, 95% CI 0.63, 2.29, P=.57). CONCLUSIONS: Vaccination acceptance differed little between African-American and white elderly patients. Using nonphysician personnel to identify and offer influenza vaccine to eligible patients is easily accomplished in primary care offices and has the potential to eliminate racial disparities in influenza vaccination.

Comparison of Point of Care and Laboratory HbA1c Analysis: A MetroNet Study

Background: Evaluating new technology in clinical practice is an important component of translating research into practice. We considered the feasibility of using a Clinical Laboratory Improvement Amendments (CLIA)-waived point of care (POC) glycohemoglobin (HbA1c) methodology in busy family medicine centers by comparing the results of POC HbA1c and laboratory analysis results. Methods: Recruited from 5 MetroNet practices, the participants were adult diabetic patients having blood samples drawn for laboratory analysis of HbA1c. Each agreed to provide a capillary blood sample for POC testing. Results: With data on 99 paired samples, the POC method yielded a mean HbA1c of 7.38%, which was equivalent to the mean of 7.53% produced with all combined standard laboratory analyses. The Pearson correlation between POC and the laboratory analysis test results was 0.884 (P < .001). POC test sensitivity was 81.8% and specificity was 93.2%. Eighteen percent of patients with an HbA1c ≥7% by laboratory analysis were not identified as such by the POC test. Conclusions: Before adopting a POC methodology, practices are encouraged to review its feasibility in the context of the office routine, and also to conduct periodic comparisons of the accuracy of POC test results compared with those from laboratory analysis.

Primary Care of Overweight Children: The Importance of Parent Weight and Attitudes about Overweight: A MetroNet Study

Purpose: The purpose of this study was to identify the association of parents’ weight and attitude about their childsweight with the childsbody mass index (BMI) status. Design: Cross-sectional, clinic-based study in a practice-based research network. Methods: One hundred seventy-one parents or adults accompanying children aged 5 to 17 years to a primary care visit in 4 family medicine centers completed a questionnaire. Parent/adult overweight status and attitudes were compared with child overweight status. Results: Forty-eight percent of children were overweight or obese (BMI ≥ the 85th percentile) as were 56% of mothers and 77% of fathers (BMI ≥ 25 kg/m2). Child and parent overweight were significantly associated, as were mother overweight and beliefs about child overweight status. Children aged 5 to 13 years were more likely to be overweight than those aged ≥14 years. Conclusions: Parents of overweight children are often overweight and many do not recognize that their children are overweight. Suggestions are made for primary care physicians to engage parents of overweight children in family weight control efforts.

Pharyngitis clinical prediction rules: effect of interobserver agreement: a MetroNet study.

OBJECTIVE Pharyngitis clinical prediction rules improve Group A beta-hemolytic streptococcus (GABHS) diagnosis and decrease unnecessary antibiotic use, yet few studies have addressed clinician variability in assessment of sore throat signs and symptoms. STUDY DESIGN AND SETTING We conducted a cross-sectional study in which two clinicians examined each of 200 adult sore throat patients. Each patient had a rapid GABHS antigen test. Clinicians were blinded to each others assessment and to the rapid antigen result. Interobserver agreement was estimated using a kappa coefficient. Effect of agreement on sensitivity, specificity, and hypothetic rapid antigen testing and antibiotic prescribing was determined for two clinical prediction rules. RESULTS We found moderate inter-rater reliability on sore throat history and physical assessments. Clinician agreement was associated with significantly fewer hypothetic rapid antigen tests performed. CONCLUSION Interobserver agreement enhances the utility of pharyngitis clinical prediction rules. Medical school and residency training should focus on correct assessment of history and physical examination components used in GABHS clinical prediction rules. Correct assessment will result in less GABHS testing and antibiotic prescriptions for sore throat patients.

Estimating Health Literacy in Family Medicine Clinics in Metropolitan Detroit: A MetroNet Study

Objective: Assessing health literacy during the clinical encounter is difficult. Many established instruments are lengthy and not practical for use in a busy practice setting. Our objective was to compare the performance of 3 health literacy screening questions against the Short Test of Functional Health Literacy for Adults (S-TOFHLA) in an urban, ethnically diverse primary care practice-based research network. Methods: A convenience sample of patients in clinics in the Detroit area were recruited to complete a questionnaire that included the S-TOFHLA and 3 items similar to the Chew screening questions. Area under the receiver operating characteristic (AUROC) curves compared the test characteristics of the screening questions to the S-TOFHLA. Results: The participation rate was 92% (N = 599). Most participants were women (65%) and African American (51%); 51.8% had a household annual income of <

Mammography Screening Among Arab American Women in Metropolitan Detroit

20,000. Almost all (96.7%) had an adequate score on the S-TOFHLA. The screening question with the largest AUROC (0.83; 95% CI, 0.70–0.95) was “How often do you have someone help you read instructions, pamphlets or other written materials from your doctor or pharmacy?”; the AUROC for all 3 questions was 0.90 (95% CI, 0.85–0.95). Conclusions: Self-administration of the 3 screening questions demonstrated high performance compared with the 36-item S-TOFHLA interview instrument. These screening questions should help providers identify patients who may need extra support to follow health prescriptions.