Associations between different types of rhinitis symptoms and building characteristics and indoor environment factors analyzed by multi-nominal logistic regression models.

aAdjusted for gender, age and smoking.bBuildings constructed during 1961–1975 compared with buildings constructed before 1960 and during 1986–2005 (excluding buildings constructed during 1976–1985).cBuildings constructed during 1976–1985 compared with buildings constructed before 1960 and during 1986–2005 (excluding buildings constructed during 1961–1975).dPopulation density (number of persons per km2) was used as a categorical variable in this analysis: population density >1000 persons/km2 was compared with population density ≤1000 persons/km2.eDampness index, number of “yes” answers to “any dampness in the last 12 months” and “any dampness in the last 5 year”: 0, answers were both “no”; 1, only one answer was “yes”; 2, answers were “yes” to both questions. Dampness index = 2 was compared with dampness index = 0 in this analysis.*** p** p* p