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Table 1 Prevalence of cough in different regions

From: Epidemiology of cough in relation to China

Surveys Region N Definition of chronic cough Prevalence(%)
Barbee RA [7] (1991) Arizona 1109 Having cough or phlegm on most days, as much as 3 months of the year , lasting for ≥ 2 years 18
US
Lundback B [14] (1991) Norrbotten 6610   11
Sweden
Cullinan P [10] (1993) southeast England 9077 Cough every day or one-half of the days in a year. 16
Ludviksdottir D [15] (1996) Uppsala 623 Usually cough or production of phlegm in the morning during day or night in the winter 11
Sweden
Zemp E [9] (1999) 8 areas 9651 Usually cough during the day or at night, on most days for as much as 3 months each year. Smoker: 9.2
Switzerland Nonsmoker:3.3
Coultas DB [16] (2001) 81 counties 5743 Having cough or phlegm on most days for ≥ 3 consecutive months per year 9.3
US
Janson C [11] (2001) 16 countries 18277 Usually cough or production of phlegm in the morning or during the day or night in the winter 33
Europe
Cerveri I [8] (2003) 9 areas 18000 Having cough and phlegm on most days for as much as 3 months per year and for at least 2 successive years 11.9
Italy
Carter ER [17] (2006) Seattle 2397 Having a daily cough or phlegm as often as 3 months out of the year. 7.2
US
Ford AC [12] (2006) Yorkshire 4003 Experienced bouts or spasms of coughing in the previous 2 months. 12
UK
Lai KF [13] (2006) Guangzhou 1087 Cough lasting for > 8 weeks 10.9
  China