Table 1.

Comparison of the general data among the three groups

	SE group (n=105)	DC group (n=110)	HC group (n=100)	χ2/F	P
Gender (male/female)	21/84	26/84	23/77	0.462	0.794
Age (years old)	41.36±5.28	40.85±5.36	41.23±5.17	0.272	0.762
BMI (kg/m2)	22.73±2.46	22.46±2.17	22.64±2.28	0.384	0.682
Education				0.452	0.978
Primary education	31	36	33
Secondary education	46	45	40
College degree or above	28	29	27