A new multiple regression model to identify multi-family houses with a high prevalence of sick building symptoms SBS, within the healthy sustainable house study in Stockholm (3H)

The aim was to develop a new model to identify residential buildings with higher frequencies of SBS than expected, risk buildings. In 2005, 481 multi-family buildings with 10,506 dwellings in Stockholm were studied by a new stratified random sampling. A standardised self-administered questionnaire was used to assess SBS, atopy and personal factors. The response rate was 73%. Statistical analysis was performed by multiple logistic regressions. Dwellers owning their building reported less SBS than those renting. There was a strong relationship between socio-economic factors and ownership. The regression model, ended up with high explanatory values for age, gender, atopy and ownership. Applying our model, 9% of all residential buildings in Stockholm were classified as risk buildings with the highest proportion in houses built 1961-1975 (26%) and lowest in houses built 1985-1990 (4%). To identify risk buildings, it is necessary to adjust for ownership and population characteristics.