Table 1 Sensors and their data transformation processes

Smart blood pressure monitor

Numeric, blood pressure

1st degree:

SBP >  = 130 mmHg/

DBP >  = 80 mmHg;

2nd degree:

SBP >  = 140mmHg/

DBP >  = 90mmHg;

Smart blood glucose meter

Numeric, blood sugar

Fasting blood glucose standard (mmol/L):

Good: 4.4 ~ 6.1

Normal: 6.1 ~ 7.2

Fair: 7.2 ~ 8.2

Poor: 8.3 ~ 9.9

Extremely Poor: 10.0 ~ 

Smart scale

Numeric, weight

Underweight: BMI < 18.5

Normal weight:

18.5 ≤ BMI < 24.0

Overweight:

24.0 ≤ BMI < 28.0

Obesity: BMI ≥ 28.0

Smart mattress

Time series, bedridden status

Nighttime frequency, Prolonged lying time