Smoking, Respiratory Symptoms, and Diseases Lindström Mai , SRN, Jönsson Elsy , MSc, Kotaniemi Jyrki , MD, Lundbäck Bo , MD, PhD  CHEST  Volume 119, Issue 3, Pages 852-861 (March 2001) DOI: 10.1378/chest.119.3.852 Copyright © 2001 The American College of Chest Physicians Terms and Conditions

Figure 1 The study area, showing the geographic position of Norrbotten, Sweden, and Finnish Lapland. CHEST 2001 119, 852-861DOI: (10.1378/chest.119.3.852) Copyright © 2001 The American College of Chest Physicians Terms and Conditions

Figure 2 The prevalence (in percentage) of chronicproductive cough and wheezing during the last 12 months, respectively, in different smoking categories among men and women in Northern Sweden(SW) and Northern Finland (FIN). cig = cigarettes. CHEST 2001 119, 852-861DOI: (10.1378/chest.119.3.852) Copyright © 2001 The American College of Chest Physicians Terms and Conditions

Figure 3 Risks (ORs) with 95% confidence intervals forchronic productive cough and wheezing during the last 12 months, respectively, in relation to a family history (FH) of obstructiveairway disease and different smoking categories calculated by multiplelogistic regression analysis after adjustment for age, gender, socioeconomic group, and country. n-s = nonsmokers;ex-s = ex-smokers; see Figure 2 legend for expansion of abbreviation. CHEST 2001 119, 852-861DOI: (10.1378/chest.119.3.852) Copyright © 2001 The American College of Chest Physicians Terms and Conditions