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. Author manuscript; available in PMC: 2019 Apr 1.
Published in final edited form as: Proc IEEE Inst Electr Electron Eng. 2018 Feb 6;106(4):690–707. doi: 10.1109/JPROC.2017.2789319

TABLE III.

Quantization of Features.

Features Levels of
quantization		 Comments
Sex 3 0 represents missing information
Age 6 Thresholds at 40, 55, 65, 75 and 85 years old
Race 10
Zip Code 0 Removed due to its vast variation
Tobacco (Current and Ever Cigarette Use) 2 Indicators of tobacco use
Diastolic Blood Pres-sure (DBP) 3 Level 1 if DBP < 60mmHg, Level 2 if 60mmHg ≤ DBP ≤ 90mmHg and Level 3 if DBP > 90mmHg
Systolic Blood Pressure (SBP) 3 Level 1 if SBP < 90mmHg, Level 2 if 90mmHg ≤ SBP ≤ 140mmHg and Level 3 if SBP > 140mmHg
Lab Tests 2 Existing lab record or Non-Existing lab ecord in the specific time period
All other dimensions 7 Thresholds are set to 0.01%, 5%, 10%, 20%, 40% and 70% of the maximum value of each dimension