The response rate for the Family History Section of the Oregon BRFSS was 52% or 6,688 survey respondents. Of the 6,688 respondents, we excluded 525 respondents who were told by a doctor that they had diabetes and 128 respondents with missing or unknown information regarding the number of family members with diabetes were excluded. A total of 6,039 respondents without diabetes were included in this analysis.
Among respondents without diabetes, approximately 27% had a family history of diabetes. Of these, 16.1% had 1 first-degree relative with diabetes (moderate familial risk), and 11.3% had 2 or more first-degree relatives with diabetes, indicating a strong familial risk. This translates into approximately 1 in 6 Oregonians without diabetes at moderate familial risk and 1 in 9 Oregonians without diabetes at strong familial risk for diabetes.
Younger people (aged 18 to 44 years) tended to be at average familial risk of diabetes compared with older people (aged 45 or older), which underscores the strong association of chronic diseases with increased age; a positive family history of chronic disease has a similar association. More women were at strong or moderate familial risk than were men. Latinos and people of a race other than white or Latino were more heavily represented in the strong risk category than were non-Latino whites. More obese people were at strong familial risk for diabetes (16.5%) than were nonobese people (9.5%) ().
Familial Risk of Diabetes Among Respondents Without Diabetes, 2005 Oregon Behavioral Risk Factor Surveillance System
More respondents who reported making lifestyle changes in their diet or exercise to reduce the chance of developing diabetes or other conditions were at strong or moderate familial risk of diabetes than were respondents who did not report making these lifestyle changes. Similarly, more respondents who reported that they were trying to lose weight were at strong or moderate familial risk compared with those who were not trying to lose weight. More respondents who reported having their cholesterol screened were at strong or moderate familial risk for developing diabetes than were respondents who did not have their cholesterol checked ().
Provider Practices, Patients' Perceived Risk, and Select Behaviors by Familial Risk of Diabetes Among Respondents Without Diabetes, 2005 Oregon Behavioral Risk Factor Surveillance System
Adjusted logistic regression analyses revealed that, compared with respondents at average risk of diabetes, respondents at strong or moderate familial risk were more likely to report that their health care provider collected information about family history of diabetes, discussed the risk of developing diabetes or other chronic conditions, and recommended lifestyle changes in diet or exercise to reduce the chance of developing diabetes or other chronic conditions. The magnitude of the OR was directly associated with familial risk ().
Familial Risk of Diabetes as a Predictor of Provider Practice, Patients' Perceived Risk, and Select Behaviors Among Respondents Without Diabetes, 2005 Oregon Behavioral Risk Factor Surveillance System
Respondents with a strong family history of diabetes were 5 times more likely to be very or somewhat worried about developing diabetes than respondents without a strong family history (OR, 5.0; 95% confidence interval [CI], 4.0-6.2). A family history of diabetes was associated with some protective behaviors but also with some conditions that place respondents at higher risk for developing the condition. Compared with respondents without a family history of diabetes, respondents with a strong or moderate family history of the disease were more likely to report making lifestyle changes in their diet or physical activity and more likely to report they were trying to lose weight. Respondents with a moderate family history were more likely to have their cholesterol screened than were respondents without a moderate family history (). However, respondents with a strong family history were twice as likely to be obese compared to people without a family history (OR, 1.9; 95% CI, 1.5-2.3). Family history was not a predictor of increased physical activity or fruit and vegetable consumption in these adjusted models.