Table 3.

Distribution of age, sex, smoking, and hypertension in the GAW18 real dataset at different exam stages.

Variables	values	Exam 1	Exam 2	Exam 3
Age (years)	(20.3~96.72)	53.30 ± 15.91a	56.38 ± 12.96	58.24 ± 11.89
Sex	1 = Male, 2 = Female	61:81b	61:81	61:81
Smoking	1 = Smoking, 0 = Non-smoking	33:98	14:67	14:78
Hypertension	1 = Hypertension, 0 = Non-Hypertension	41:92	49:40	50:42

^a $(\overline{X}\pm S)$ for age in each exam, where $\overline{X}$ is the average and S is the standard deviation.

^bRatios for male: female, smoking: non-smoking, and hypertension: non-hypotension.