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Paper text:
this study used data from the 2008 florida behavioral risk factor surveillance system ( brfss ) .
the brfss is an ongoing , telephone - based survey of noninstitutionalized adults in households in the united states and its territories .
the brfss was established in 1984 and designed to monitor behavioral risks in the sampled population .
the brfss is funded by the centers for disease control and prevention and administered by state - based health departments . a sample of telephone numbers within each state is randomly selected using a disproportionate stratified sample design to obtain a probability sample ( 14,15 ) .
each state uses trained interviewers to collect data , which , when weighted , are representative of the state s noninstitutionalized adult population 18 years of age ( 14 ) .
in addition to socioeconomic questions , the brfss survey instrument contains questions about a variety of health topics , including overall health status , chronic health conditions ( including diabetes ) , disability , oral health , cancer screening , physical activity , nutrition , immunization , and mental health .
state health departments are allowed to include state - added questions in response to emerging issues and to collect additional data on a specific topic .
this study used answers to the diabetes - related brfss questions listed in table 1 ( 16 ) .
diabetes - related questions from the 2008 florida brfss that were used in this study * additional verbiage that appeared before or after questions to define specific terms has been omitted . the single question ascertaining whether respondents had ever taken a class or course in how to manage their diabetes allows public health systems to monitor the percentage of adults with diabetes who receive dsme on a state and national level .
there are two significant problems with using this question : first , one can not determine the quality of and setting for dsme delivery ; and , second , one can not quantify dsme duration for each respondent . a state - added question included in the 2008 florida brfss survey attempted to quantify dsme duration but did not attempt to ascertain dsme quality and setting .
respondents who indicated they had ever taken a course or class in how to manage diabetes were asked to respond to the state - added question listed in table 1 ( 17 ) .
of the 1,446 respondents with diagnosed diabetes , 1,445 ( 99.9% ) had valid responses to the diabetes module s dsme question , and 1,335 ( 92.3% ) had valid responses to the state - added dsme duration question .
to our knowledge , florida is the only state that has used this state - added question . from the responses to this added question , the independent variable of interest , dsme duration ,
was categorized in the following manner : no dsme , > 0 to < 4 hours , 410 hours , and > 10 hours .
several dichotomous ( yes / no ) dependent variables were examined using data from corresponding questions listed in table 1 : engaged in self - monitoring of blood glucose ( smbg ) at least once per day on average ( engaged in smbg ) ; received at least one dilated retinal exam in the past year ( annual eye exam ) ; received at least one foot exam by a health care professional in the past year ( annual foot exam ) ; received at least two a1c tests in the past year ( two hba1c tests ) ; received an influenza vaccination either by injection or spray in the past year ( annual flu shot ) ; ever received a pneumococcal vaccination ( one - time pneumococcal ) ; and uses insulin . for each of the dependent variable questions ,  do nt know  and  refused  were response options on the survey that were treated as missing data in the analyses .
the data were weighted to account for nonresponse and were managed using sas version 9.2 ( sas , cary , n.c . ) .
descriptive ,  , and logistic regression analyses were conducted using sudaan version 11.0 ( sudaan , research triangle park , nc ) .
the university of north florida institutional review board approved the use of the 2008 florida brfss data .
the results of the analyses indicate that there are a number of statistically significant associations between dsme duration and the outcomes of interest . because of the cross - sectional study design
table 2 shows the number of respondents with diagnosed diabetes , the prevalence of diabetes by sociodemographic characteristics , and the percentage of each sociodemographic characteristic among those with diabetes .
in addition , the table shows the percentage of adults with diabetes in each dsme duration category ( among those with valid dsme duration responses ) . in florida in 2008 , the prevalence of diabetes was statistically significantly higher among those in the following subpopulations : non - hispanic blacks , those 45 years of age , those with a high school education or less , those earning < $ 50,000 per year , and those with health insurance . among those with valid dsme duration responses
, 52.1% received no dsme , 22% had < 4 hours of dsme , 14.8% had 410 hours of dsme , and 11.6% had > 10 hours of dsme . the percentage receiving each level of the dsme duration
did not vary significantly by sex , race / ethnicity , age - group , education level , income , or marital status ( data not shown ) .
diabetes prevalence among adults by sociodemographic covariates and distribution of each covariate among diagnosed adults , florida brfss 2008 figure 1 shows the percentage of adults who received services or engaged in self - management practices by dsme duration category.the percentage who engaged in smbg varied significantly by dsme duration category ( p < 0.05 ) .
the percentage engaging in smbg was highest among those who received 4 hours of dsme . although the percentage who had an annual eye exam increased with increasing dsme duration , the differences were not statistically significant .
the percentages of individuals who had an annual foot exam , had at least two a1c tests in the past year , and had received an annual influenza vaccination had positive dose - response relationships with dsme duration ( all p < 0.05 ) .
the percentages of individuals who received a one - time pneumococcal vaccination varied significantly by dsme duration category ( p < 0.05 ) .
the percentage receiving this vaccination was highest among those who received 4 hours of dsme .
each of the dependent variables was statistically significant for trend , with the exception of annual eye exams , suggesting a dose - response relationship between dsme duration and these dependent variables .
percentage of florida adults with diagnosed diabetes who received services or engaged in self - management practices by dsme duration category , florida brfss 2008 .
table 3 shows the adjusted odd ratios ( ors ) for receiving services or engaging in self - management practices by dsme duration category from logistic regression models adjusted for sex , race / ethnicity , age - group , education level , marital status , health insurance status , and insulin use status .
education level was used as a proxy for socioeconomic status , and annual income was not included in the logistic regression models because these two indicators are highly correlated ( 18 ) .
compared to those who did not receive dsme , the adjusted odds of performing smbg , having had an annual eye exam , and having had an annual foot exam did not vary significantly by dsme duration category .
the adjusted odds of having had at least two a1c tests in the past year was 2.69 ( 95% ci 1.305.58 ) times higher among those who received 410 hours of dsme and 2.63 ( 95% ci 1.106.31 ) times higher among those who received > 10 hours of dsme compared to those receiving 0 hours .
the adjusted odds of having an annual flu shot was 2.20 ( 95% ci 1.184.09 ) times higher among those who received > 10 hours of dsme compared to those who received no dsme .
finally , the adjusted odds of ever receiving a pneumococcal vaccination was almost twice as high among those who received 410 hours ( or 1.98 , 95% ci 1.033.80 ) and > 10 hours of dsme ( or 1.92 , 95% ci 1.013.64 ) compared to those who did not receive dsme .
results from logistic regression models for clinical services or self - management practices , florida brfss 2008 all referent categories have an or of 1.00 .
existing literature documents the benefits of engaging in self - management practices and receiving clinical services for those with diabetes ( 10,1922 ) . likewise , the literature documents positive associations between receiving dsme and clinical and self - care ( 10,20,22 ) .
what remains less understood is the association between dsme duration and receiving clinical care or engaging in self - care practices .
a review of existing literature did not reveal any large , population - based studies examining the relationship between dsme duration and clinical- or self - care outcomes .
the results of this study show that , among those with diagnosed diabetes who received dsme , a positive association exists between dsme duration and a number of clinical - care utilization patterns . in particular , having received at least 4 hours of dsme had the greatest impact on clinical - care utilization , specifically a1c testing and influenza and pneumococcal vaccinations .
the results also indicate that those who use insulin have significantly higher odds of performing smbg and having an annual foot examination .
a number of potential confounding variables are associated with the patient behaviors and outcomes of interest in this study but were not well recorded in the available data ( 2330 ) .
these variables can be broadly grouped into provider behaviors , social support , and access to care issues .
provider behaviors include providing patients with the care outlined in clinical practice guidelines , providing necessary referrals to specialty care such as podiatrists and ophthalmologists , and effectively communicating with patients to ensure they understand examination outcomes and the importance of receiving the recommended care .
the ability to quantify social support variables was very limited in the data used for this study .
finally , although the data presented controls for having health insurance , insurance is only part of the overall access - to - care construct .
variables such as the inability to access the health care system because of monetary , transportation , geographic isolation , and psychosocial issues were not included .
finding the balance between dsme duration and best health outcomes is crucial for people with diabetes .
it is imperative to determine the most effective dose of dsme necessary to decrease the prevalence of the debilitating consequences of poor diabetes outcomes while also containing costs and making the best use of limited resources . although the results of this study help to inform this endeavor , more research is needed .
in addition to examining the effects of dsme duration , further qualifying the nature of dsme delivery is another area that needs more study ( 11,12 ) .
important topics to consider in future studies include determining the most effective length for a single session of dsme , the most beneficial time lapse between individual sessions , and the optimal total number of sessions that a person with diabetes should receive .
in addition , studies comparing health outcomes of individual- versus group - based dsme would help guide health educators to the most prudent , cost - effective approach .
the combined results of studies such as these would provide a more complete , evidence - based picture of what constitutes a successful dsme program .
there are a number of limitations to consider when examining the results of this analysis .
the brfss is a cross - sectional study , and one can not infer causal relationships from the results .
the 2008 florida brfss was a telephone - based questionnaire administered to a sample of individuals living in households with landlines .
given the sampling methodology , those without landline telephones in the household and those who do not reside in households ( e.g. , homeless individuals and those who reside in institutional settings ) were not eligible for participation , increasing the chances of exclusion bias .
the brfss collects self - reported data , which may introduce recall and interviewer bias .
in addition , the dsme duration question was a state - added question unique to the 2008 florida brfss , and the means to verify the information provided by respondents did not exist .
therefore , the authors can not evaluate the accuracy and precision of the question using the study data . moreover , although the state - added dsme duration question provides a means to quantify the estimated number of hours of dsme a respondent received , it does not collect data for the following important considerations : educational setting , curriculum quality , course sequence , and spacing of dsme hours over time ( i.e. , days , weeks , or months ) .
finally , the outcome behaviors examined are potentially influenced by health care provider behaviors and referral practices .
the effects of provider behavior on the outcomes studied can not be assessed using these data . however , this line of inquiry is a logical next step in research on this topic . given the ever - increasing magnitude of diabetes incidence and prevalence , the potential for devastating health complications , and the skyrocketing costs associated with diabetes , the urgent need for effective dsme is clear . the results of this study can be used as an important segue for future studies that strive to hone and refine best practices in dsme delivery .
it is already widely accepted that dsme is associated with improved clinical / self - care and diabetes - related health outcomes ( 4,79 ) .
further elucidating the parameters of what constitutes the most effective form and dosage of dsme will help improve evidence - based strategies for preventing complications and maintaining a good quality of life among people with diabetes .
objective . 
 previous studies have shown that receiving diabetes self - management education ( dsme ) is associated with increased care utilization . 
 however , the relationship between dsme duration and care utilization patterns remains largely unexamined . 
 our purpose is to characterize dsme duration and examine the relationship between dsme duration and clinical- and self - care utilization patterns.methods . 
 the study sample included 1,446 adults who were 18 years of age , had diabetes , and had participated in the 2008 florida behavioral risk factor surveillance system survey . 
 clinical- and self - care outcomes were derived using responses to the survey s diabetes module and were based on minimum standards of care established by the american diabetes association . 
 the outcomes examined included self - monitoring of blood glucose at least once per day ; receiving at least one eye exam , one foot exam , a1c tests , and an influenza vaccination in the past year ; and ever receiving a pneumococcal vaccination . 
 dsme duration was categorized as no dsme , > 0 to < 4 hours , 410 hours , and > 10 hours.results . after adjusting for sociodemographic variables , 
 compared to those who did not receive dsme , those who had 410 or 10 + hours of dsme were more likely to receive two a1c tests ( odds ratio [ 95% ci ] 2.69 [ 1.305.58 ] and 2.63 [ 1.106.31 ] , respectively ) and have a pneumococcal vaccination ( 1.98 [ 1.033.80 ] and 1.92 [ 1.013.64 ] , respectively ) . 
 those receiving 10 + hours of dsme were 2.2 times ( 95% ci 1.184.09 ) as likely to have an influenza vaccination.conclusion . 
 these data reveal a positive relationship between dsme duration and utilization of some diabetes clinical care services .