fasting plasma glucose (mmol/L)

Blood pressure including systolic blood pressure and diastolic blood pressure (mmHg)

total cholesterol (mmol/L)

Triglyceride (mmol/L)

High density lipoprotein-Cholesterol (mmol/L)

Low density lipoprotein-Cholesterol (mmol/L)

Total bilirubin (μmol/L), Direct bilirubin (μmol/L)

Total bilirubin (μmol/L), Direct bilirubin (μmol/L)

Blood urea (mmol/L)

Serum creatinine (μmol/L)

Uric acid (μmol/L)

oral glucose tolerance test-2 hour (mmol/L)

9 items from Summary of Diabetes Self Care Activities and Behavioral Risk Factor Surveillance System. Items 1-7 measure diabetes self care activities during the previous 7 days. Items 1, 2, 4-7 are assessed on a scale of 0 to 7 days. Item 3 is assessed on scale of 1-4, where 1 represents very low levels of daily activity and 4 represents very high levels of daily activity. Items 8 and 9 are yes/no questions that measure cigarette intake over the past 7 and 30 days.

6-item Euro quality-of-life-5D, a standardized instrument for measuring generic health status. The respondents are asked to choose one of the statements which best describes their health status on the surveyed day. Rated level can be coded as a number 1, 2, or 3, which indicates having no problems for 1, having some problems for 2, and having extreme problems for 3. As a result, a person's health status can be defined by a 5-digit number, ranging from 11111 (having no problems in all dimensions) to 33333 (having extreme problems in all dimensions). Item 6 is the visual analogue scale, in which respondents are asked to mark their health status on the day of the interview on a 20 cm vertical scale with end points of 0 and 100, where 0 corresponds to "the worst health you can imagine", and 100 corresponds to "the best health you can imagine"

4-item Diabetes Distress Scale, an abbreviated version of the 17-item Diabetes Distress Scale. The respondents are asked to respond to which degree each of the items has bothered them in the past month on a 6-point scale (1-6), where 1 is not a brother and 6 is very bothersome. Scores are summed and divided by 4 to calculate the mean. Mean scores of 3 or higher (moderate distress) are considered worthy of clinical attention.

8-item Patient Health Questionnaire (PHQ), the PHQ-9 minus the last question on suicidal thoughts. The PHQ is a standard instrument used in primary care settings to screen for the presence and severity of depression. The respondents are asked how often they have been bothered by each of the 8 items in the past 2 weeks on a 4 point scale (0-3), where 0 is "not all" and 3 is "nearly every day". The scores for each item are summed to produce a total score between 0 and 24 points. A total score of 0 to 4 represents no significant depressive symptoms. A total score of 5 to 9 represents mild depressive symptoms; 10 to 14, moderate; 15 to 19, moderately severe; and 20 to 24, severe.

6 questions

6 questions

5 questions

Demographic questions, medical histories, risk factors including family history, smoking, alcohol drinking, diet, and exercises, medication information and adherence.

C-reaction protein