Table 2.

Summary of response patterns for independent variables.

Variable	Category	N	Percentage (%)
Gender	Female	296	55.6
	Male	236	44.4
	Total	532	100
Age	Less than 30	227	42.7
	30–39	201	37.8
	40–49	68	12.8
	50 and more	36	6.8
	Total	532	100
Education	High school or lower	78	14.7
	Bachelor’s or an equivalent	255	47.9
	Master’s degree	116	21.8
	Ph.D. Total	83 532	15.6 100
Marital status	Married	280	52.6
	Single	252	47.4
	Total	532	100
Monthly income	RMB 0–4999	172	32.3
	RMB 5000–7999	118	22.2
	RMB 8000–9999	80	15
	RMB 10,000–14,999	82	15.4
	RMB 15,000–19,999	40	7.5
	RMB 20,000 or more	40	7.5
	Total	532	100
Environmental knowledge	Never/rarely	136	25.6
	Sometimes	304	57.1
	Usually/always	92	17.3
	Total	532	100