Table 1 Measurements included in the DiaDDZoB Study
Variable | Categories | Measurement occasion |
|---|---|---|
Demographic factors | ||
Age | M0 | |
Gender | Male, female | M0 |
Ethnicity | Dutch, other Caucasian (white Western) groups, other (Asian, black, Turkish/Moroccan) | M0 |
Marital status | Married/living together, single, LAT relationship, divorced/ separated, widowed | M0, M1, M2 |
Living situation | Independent, residing with family/friends, residing in a nursing home | M0, M1, M2 |
Employment status | Paid employment, unemployed, disabled, no paid employment, retired | M0, M1, M2 |
Education level | Primary school, primary vocational education, secondary school, secondary vocational education, higher vocational education, university | M0 |
Medical history | ||
Disease duration | Months/years since diabetes diagnosis | M0, M1 |
Medical history | M0: lifetime history: arterial disease, bypass/angioplasty, myocardial infarction, stroke, angina pectoris, high cholesterol, kidney disease, asthma/COPD, cancer, rheumatic disorder, depression, burn-out M1 and M2: during last 12 months: arterial disease, bypass/angioplasty, myocardial infarction, stroke, angina pectoris, high cholesterol, asthma/COPD, osteoporosis, depression, kidney disease | M0, M1, M2 |
Treatment | ||
Current hyperglycemia treatment modality | None, diet, diet/oral agents, diet/ insulin, diet/oral agents/insulin, other | M0, M1, M2 |
Medication use | ACE inhibitors, β-blockers, calcium antagonists, diuretics, other antihypertensive agents, statins | M0, M1, M2 |
Laboratory tests | ||
HbA1c | M0, M1, M2 | |
Fasting glucose | M0, M1, M2 | |
Cholesterol | Total cholesterol | M0, M1, M2 |
LDL-cholesterol | M0, M1, M2 | |
HDL-cholesterol | M0, M1, M2 | |
Triglycerides | M0, M1, M2 | |
Protein levels | Albumin | M0, M1, M2 |
Creatinin | M0, M1, M2 | |
Albumin-to-creatinin ratio | M0, M1, M2 | |
MDRD clearance | M1, M2 | |
Physical examination | ||
Length | Length in metres | M0, M1, M2 |
Weight | Weight in kilograms | M0, M1, M2 |
Body Mass Index (BMI) | Weight in kilograms/(length in metres)2 | |
Blood pressure | Systolic | M0, M1, M2 |
Diastolic | M0, M1, M2 | |
Fundus photography | Unassessable, normal, retinopathy | M0, M1, M2 |
Foot examination | M0: Normal, abnormal M1 and M2: Normal, neuropathy, ischemia, wound/ulcer, excessive coldness | M0, M1, M2 |
Lifestyle indicators | ||
Smoking behavior | Current smoking: yes/no, number of cigarettes per day | M0, M1, M2 |
Additional for M0: smoking history | ||
Alcohol consumption | Current alcohol consumption: yes/no, number of consumptions per week | M0, M1, M2 |
Additional for M0: history of alcohol consumption | ||
Physical activity | Hours per week of active physical activity | M0, M1, M2 |
Hours per week of sportive physical activity | M0, M1, M2 | |
Psychological factors | ||
Depressive symptoms | Edinburgh Depression Scale (EDS) | M0, M1, M2 |
Type D personality | Type D Scale-14 (DS14) | M1, M2 |
Social support | O'Hara's modified Social Support Scale | M0, M1, M2 |
Loneliness | Single item concerning feelings of loneliness in the past 12 months | M0, M1, M2 |
Stressful life events | Single item concerning stressful life event(s) in the past 12 months | M0, M1, M2 |