Table 1.

Comparison of the sociodemographic characteristics of the two groups of participants.

Characteristics	n = 270	NTM group (n = 180)	Control group (n = 90)	χ2	p-Value
Age				0.030	0.863
≤ 50 yrs	128	86	42
>50 yr	142	94	48
Gender				1.964	0.161
Male	110	68	42
Female	160	112	48
Education level				12.157	0.002
Junior high school	80	65	15
High school	113	72	41
The University	77	43	34
Marital status				1.795	0.408
Unmarried	16	10	6
Married	232	158	74
Divorced/Widowed	22	12	10
Underlying disease				89.896	0.000
Yes	186	158	28
No	84	22	62
Occupation				9.645	0.008
Farmer	77	62	15
Freelance	95	60	35
Permanent job	98	58	40
Living environment				20.972	0.000
Rural	100	82	18
Suburban	88	57	31
Urban	82	41	41
Smoking history				0.030	0.862
Yes	118	78	40
No	152	102	50
BMI				39.725	0.000
Low	125	105	20
Normal	83	51	32
High	62	24	38

The bold values means that the p value is statistically significant (p <0.05).