Possible associations between emissions from two types of fresh wood (spruce and pine) in indoor environments, and health effects, have been studied in a controlled experimental laboratory experiment. The experiment consisted of a randomized, double-blind cross-over study. Number of participants (N = 40) was determined considering both practical feasibility and statistical power calculations.
Measurements of volatile organic compounds (VOCs) emitted from fresh wood in an indoor environment was chosen as an expression of exposure. As outcome variables in terms of possible health effects, inflammation in the airway mucosa and eyes were registered, spirometry and measurement of NO in exhaled breath to measure effects in the respiratory tract was measured, and attention/behavioral symptoms were mapped using simple standardized computer-based neuropsychological tests used also in previous scientific studies. Symptoms were recorded using a questionnaire.
Data collection was completed during winter 2013, data preparation and initial analysis was done in 2014. Final publication is planned for 2015.