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Table 3 Variable assignment used in logistic regression and decision tree

From: Analysis of risk factors for carotid intima-media thickness in patients with type 2 diabetes mellitus in Western China assessed by logistic regression combined with a decision tree model

Variable Assignment
CIMT L-CIMT or R-CIMT met any of the following criteria
0 = normal (CIMT < 1 mm)
1 = increased CIMT (CIMT ≥ 1 mm)
Gender 0 = male
1 = female
Age 1 = young and middle-aged (age < 60 years)
2 = old age (age ≥ 60 years)
Smoking 0 = no
1 = yes
Blood pressure 0 = normal (SBP < 140 mmHg and/or DBP < 90 mmHg)
1 = hypertention (SBP ≥ 140 mmHg and/or DBP ≥ 90 mmHg)
BMI 1 = normal (BMI < 24 kg/m2)
2 = overweight (24 kg/m2 ≤ BMI < 28 kg/m2)
3 = obesity (28 kg/m2 ≤ BMI < 30 kg/m2)
4 = severe obesity (BMI ≥ 30 kg/m2)
Waist circumference 0 = normal (male < 90 cm, female < 85 cm)
1 = increased waist circumference (male ≥ 90 cm, female ≥ 85 cm)
VFA 0 = normal (VFA < 80 cm2)
1 = increased VFA (VFA ≥ 80 cm2)
SFA 0 = normal (SFA < 100 cm2)
1 = increased SFA (SFA ≥ 100 cm2)
Glu 0 1 = excessively controlled (Glu0 < 4.4 mmol/L)
2 = well controlled (4.4 mmol/L ≤ Glu0 ≤ 7.0 mmol/L)
3 = poorly controlled (Glu0 > 7.0 mmol/L)
Glu120 1 = well controlled (Glu120 ≤ 7.8 mmol/L)
2 = generally controlled (7.8 mmol/L < Glu120 < 10 mmol/L)
3 = poorly controlled (Glu120 ≥ 10 mmol/L)
HbA1c 1 = well controlled (HbA1c < 7 %)
2 = generally controlled (7 % ≤ HbA1c < 8 %)
3 = poorly controlled (HbA1c ≥ 8 %)
CKD 1 = G1 (eGFR ≥ 90 ml/min)
2 = G2 (60 ml/min ≤ eGFR < 90 ml/min)
3 = G3 (30 ml/min ≤ eGFR < 60 ml/min)
UA 0 = normal
1 = hyperuricemia (male > 420 ummol/L; female > 360 umol/L)
Blood lipid 0 = normal
1 = dyslipidaemia (met any of the following criteria: TG ≥ 2.26 mmol/L; TC ≥ 6.26 mmol/L; LDL≥ 4.14 mmol/L; HDL < 1.04 mmol/L)
ABI 0 = non-stenosis (L-ABI and/or R-ABI > 0.9)
1 = stenosis (L-ABI or R-ABI ≤ 0.9)
  1. CIMT carotid intima media thickness, SBP systolic blood pressure, DBP diastolic blood pressure, BMI body mass index, VFA visceral fat area, SFA subcutaneous fat area, Glu0 fasting blood glucose, Glu120 2-hour postprandial blood glucose, HbA1C glycated hemoglobin A1c, CKD chronic kidney disease, eGFR estimated glomerular filtration rate, UA uric acid, TG triglyceride, TC cholesterol, LDL-c low density lipoprotein cholesterol, HDL-c high density lipoprotein cholesterol, ABI ankle brachial index, L-ABI left ankle brachial index, R-ABI right ankle brachial index