... by smoking, but tests for interaction were mainlynon-significant. No interaction with smoking was found in any of the abovementioned studies of the effects of airpollution on prevalence/incidence ... rate in the morepolluted city of Malmö (73% vs. 80% in the remainingregion).Outcome measuresThe following outcomes were investigated, as obtained bythe postal questionnaires:• Diagnosis of ... sourcesincluded in the model were: road traffic, shipping, avia-tion, railroad, industries and larger energy and heat pro-ducers, small scale heating, working machines, workingvehicles, and working...