Table 6. The overall prevalence of AR between the urban and rural areas in several countries, including Germany after reunification.

Author	Year	Nation	Study method	Study population	Number of subjects (n)		Prevalence of AR (%)
Nicolai [19]	1994	Germany	Questionnaire	Children aged 9-11 years	West	5,030	West	8.6
					East	2,623	East	2.7
Heinrich [20]	1990	Germany	Questionnaire	Adults aged 20-44 years	West	3,934	West	22.9
					East	4,429	East	13.3
	1994	Germany	Questionnaire	Adults aged 20-44 years	West	4,327	West	24.6
					East	3,819	East	15.9
Kim [21]	2002	Korea	Questionnaire	Children aged 7-18 years	Urban	7,131	Urban	30.1-30.2
					Rural	9,493	Rural	24.1-33.6
Graif [22]	2004	Israel	Questionnaire	Children aged 13-14 years	Urban & Rural	10,057	Urban	9.8
							Rural	8.1
Viinanen [18]	2005	Mongolia	Questionnaire	Subjects aged 10-60 years	City	896	City	18.4
					Town	537	Town	12.9
					Village	304	Village	9.3
Kowalski [23]	2007	Poland	Questionnaire	Children aged 12-16 years	Urban	201	Urban	38.81
					Rural	203	Rural	10.84
Guner [24]	2010	Turkey	Questionnaire	Children aged 6-18 years	Urban	354	Urban	22.6
					Rural	253	Rural	21.3
Abong [25]	2012	Philippines	Questionnaire	Adults	Urban	3,418	Urban	18
					Rural	3,714	Rural	22.1

AR, allergic rhinitis.