Table 5. One-way ANOVA for differences between the groups.

Variable	Groups	N	Mean of DPB score	SD	df	F	Sig.
Age					3	3.812	0.000
	18-34	384	1.47	1.73
	35-44	357	1.84	2.17
	45-54	261	1.45	1.90
	>55	267	1.38	1.84
Education level					3	0.537	0.657
	Illiterate	81	1.33	2.17
	Less than high school	270	1.51	1.84
	High school	426	1.56	1.87
	More than high school	456	1.61	1.99
Residential districts					2	14.847	0.000
	High risk	381	1.31	1.76
	Medium risk	459	1.39	1.98
	Relatively low risk	393	1.98	1.95
Monthly income level					2	74.695	0.000
	Low	801	1.10	1.42
	Middle	354	2.31	2.34
	High	78	2.85	2.66