Risk factor commonality coefficient % Total
Unique to age 0.0386 23.92
Unique to SBP 0.0046 2.84
Unique to HbA1c 0.0404 25.07
Unique to duration of diabetes 0.0358 22.23
Common to age and SBP -0.0018 -1.14
Common to age and HbA1c 0.0398 24.68
Common to SBP and HbA1c 0.0016 1.00
Common to  age and duration of diabetes -0.01 -6.18
Common to  SBP and duration of diabetes 0.00 0.00
Common to  HbA1c and duration of diabetes 0.0216 13.43
Common to age, SBP and HbA1c -0.0011 -0.7
Common to age, SBP, and duration of diabetes -0.0004 -0.28
Common to age, HbA1c, and duration of diabetes -0.0087 -5.38
Common to SBP, HbA1c, and duration of diabetes -0.0003 -0.21
Common to age, SBP, HbA1c, and duration of diabetes 0.0012 0.73
Total (%) 0.1612 100
Note: Commonality coefficient identifying suppression underlined.
DME: Diabetic Macular Edema; HbA1c: Haemoglobin A1c; SBP: Systolic Blood Pressure
Σ Commonality coefficient = multiple R2
% Total= (Commonality coefficient)/(multiple R2)
Unique variance=x’s unique variance; Common=common variance; Total=Unique+Common;
Table 4: Commonality matrix of risk factors for diabetic macular edema (DME) in patients with type 2 diabetes.