Associations between respiratory infections (by ordinal regression models), antibiotic medication for respiratory infections (by logistic regression models), building characteristics and indoor environment factors.

aThe ORs were expressed per 10000 increase of the population density (number of persons per km2).bDampness 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.cThe ORs were expressed per 1 unit increase for window-opening index.dAdjusted for gender, age and smoking.eMutual adjustment models including gender, age and smoking for all subjects (inclusion criteria is pfMutual adjustment models including gender, age and smoking for subjects ≤65 years old (inclusion criteria is pgMutual adjustment models including gender, age and smoking for subjects >65 years old (inclusion criteria is phSubjects with missing data on age (n = 49) were excluded.*** p** p* p