Table 2. Characteristics of the respondent.

Variable	n (%)		χ2-value	P-value
	Macao (n = 977)	Zhuhai (n = 2,818)
Gender
Female	530 (54.2%)	1,663 (59.0%)	6.755	0.009
Male	447 (45.8%)	1155 (41.0%)
Age
<20	355 (36.3%)	602 (21.4%)	86.247	<0.001
≥20	622 (63.7%)	2,216 (78.6%)
Major
Medical	217 (22.2%)	268 (9.5%)	104.984	<0.001
Non-medical	760 (77.8%)	2,550 (90.5%)