Table 1.

Membership functions for attributes of CAD.

Age	${\mu }_{\text{young}}\left(x\right)=\left\{\begin{array}{cc}1\hfill & x<30\hfill \\ \frac{(40-x)}{10}\hfill & 30\le x<40\hfill \end{array}\right.$
	${\mu }_{\text{Middle\hspace{0.17em}age}}\left(x\right)=\left\{\begin{array}{cc}\frac{(x-30)}{10}\hfill & 30\le x<40\hfill \\ 1\hfill & 40\le x<50\hfill \\ \frac{(60-x)}{10}\hfill & 50\le x<60\hfill \end{array}\right.$
	${\mu }_{\text{old}}\left(x\right)=\left\{\begin{array}{cc}\frac{(x-50)}{10}\hfill & 50\le x<60\hfill \\ 1\hfill & 60\le x\hfill \end{array}\right.$
Cholesterol	${\mu }_{\text{Normal}}\left(x\right)=\left\{\begin{array}{cc}1\hfill & x<170\hfill \\ \frac{(200-x)}{30}\hfill & 170\le x<200\hfill \end{array}\right.$
	${\mu }_{\text{Borderline}}\left(x\right)=\left\{\begin{array}{cc}\frac{(x-170)}{30}\hfill & 170\le x<200\hfill \\ 1\hfill & 200\le x\le 225\hfill \\ \frac{(250-x)}{25}\hfill & 225\le x<250\hfill \end{array}\right.$
	${\mu }_{\text{High}}\left(x\right)=\left\{\begin{array}{cc}\frac{(x-225)}{25}\hfill & 225\le x<250\hfill \\ 1\hfill & x\ge 250\hfill \end{array}\right.$
Triglyceride	${\mu }_{\text{Normal}}\left(x\right)=\left\{\begin{array}{cc}1\hfill & x<130\hfill \\ \frac{(200-x)}{70}\hfill & 130\le x<200\hfill \end{array}\right.$
	${\mu }_{\text{Borderline}}\left(x\right)=\left\{\begin{array}{cc}\frac{(x-130)}{70}\hfill & 130\le x<200\hfill \\ 1\hfill & 200\le x\le 300\hfill \\ \frac{(400-x)}{100}\hfill & 300\le x<400\hfill \end{array}\right.$
	${\mu }_{\text{High}}\left(x\right)=\left\{\begin{array}{cc}\frac{(x-300)}{100}\hfill & 300\le x<400\hfill \\ 1\hfill & x\ge 400\hfill \end{array}\right.$
LDL	${\mu }_{\text{normal}}\left(x\right)=\left\{\begin{array}{cc}1\hfill & x<110\hfill \\ \frac{(130-x)}{20}\hfill & 110\le x<130\hfill \end{array}\right.$
	${\mu }_{\text{middle}}\left(x\right)=\left\{\begin{array}{cc}\frac{(x-110)}{20}\hfill & 110\le x<130\hfill \\ 1\hfill & 130\le x<145\hfill \\ \frac{(160-x)}{15}\hfill & 145\le x<160\hfill \end{array}\right.$
	${\mu }_{\text{High}}\left(x\right)=\left\{\begin{array}{cc}\frac{(x-145)}{15}\hfill & 145\le x<160\hfill \\ 1\hfill & x\ge 160\hfill \end{array}\right.$
Systolic blood pressure	${\mu }_{\text{Low}}\left(x\right)=\left\{\begin{array}{cc}1\hfill & x<105\hfill \\ \frac{(125-x)}{20}\hfill & \mathrm{105}\le x<125\hfill \end{array}\right.$
	${\mu }_{\text{Middle}}\left(x\right)=\left\{\begin{array}{cc}\frac{\left(x-105\right)}{20}\hfill & 105\le x<125\hfill \\ \mathrm{1}\hfill & 125\le x\le 145\hfill \\ \frac{\left(170-x\right)}{25}\hfill & 145\le x<170\hfill \end{array}\right.$
	${\mu }_{\text{High}}\left(x\right)=\left\{\begin{array}{cc}\frac{\left(x-145\right)}{25}\hfill & 145\le x<170\hfill \\ 1\hfill & 170\le x\le 180\hfill \\ \frac{\left(210-x\right)}{30}\hfill & 180\le x<210\hfill \end{array}\right.$
	${\mu }_{\text{Very\hspace{0.17em}high}}\left(x\right)=\left\{\begin{array}{cc}\frac{(x-180)}{30}\hfill & 180\le x<210\hfill \\ 1\hfill & x\ge 210\hfill \end{array}\right.$
SSS	${\mu }_{\text{Normal}}\left(x\right)=\left\{\begin{array}{cc}1\hfill & x<2\hfill \\ \frac{(4-x)}{2}\hfill & 2\le x<4\hfill \end{array}\right.$
	${\mu }_{\text{Mild}}\left(x\right)=\left\{\begin{array}{cc}\frac{(x-2)}{2}\hfill & 2\le x<4\hfill \\ 1\hfill & 4\le x<7\hfill \\ \frac{(9-x)}{2}\hfill & 7\le x<9\hfill \end{array}\right.$
	${\mu }_{\text{Moderate}}\left(x\right)=\left\{\begin{array}{cc}\frac{(x-7)}{2}\hfill & 7\le x<9\hfill \\ 1\hfill & 9\le x<13\hfill \\ \frac{(16-x)}{3}\hfill & 13\le x<16\hfill \end{array}\right.$
	${\mu }_{\text{Severe}}\left(x\right)=\left\{\begin{array}{cc}\frac{(x-13)}{3}\hfill & 13\le x<16\hfill \\ 1\hfill & x\ge 16\hfill \end{array}\right.$