TY - JOUR T1 - Comparison of spirometric results obtained in sitting and standing position in children participating in epidemiological study JF - European Respiratory Journal JO - Eur Respir J DO - 10.1183/13993003.congress-2016.PA4230 VL - 48 IS - suppl 60 SP - PA4230 AU - Grzegorz Brozek AU - Jan Zejda AU - Agnieszka Jarosinska AU - Agnieszka Idzik AU - Lawson Joshua Y1 - 2016/09/01 UR - http://erj.ersjournals.com/content/48/suppl_60/PA4230.abstract N2 - It's recommended that spirometric testing in children be completed while sitting, our experience is that children feel more comfortable standing during spirometry.Aim: We sought to compare spirometric results obtained from the sitting (SI) and standing (ST) positions.Method: Two testing sessions were performed in random order (SI vs ST position: testing 30-45 min. apart) in 118 children aged 7-13 y-rs, attending randomly selected, primary school in town of Katowice (response rate: 92%).Results: Tests of acceptable quality were found in 77.9% of ST and 77.1% of SI position - 29 girls and 49 boys (mean age=9.0±1.6 y-rs). The frequency of chronic cough was 33.7%, of chest wheeze was 11.6%, and of attacks of dyspnea was 9.0%. Higher values of spirometric variables on ST, compared to SI position, were for FVC (2.12±0.41 l vs 2.11±0.39 l) and FEV1 (1.78±0.36 l vs 1.77±0.35) but the differences were not statistically significant. Mean relative between-position differences [RBPD] were for FVC: 5.5±4.5%, FEV1: 5.8±6.6%, PEF: 12.4±9.5%, and FEF2575: 15.9±16.8%. RBPD ≤ 5% was found in: FVC: 56.4 %, FEV1: 69.2 %, PEF: 21.7%, and FEF2575: 24.3%. Patterns for FEF25, FEF50, and FEF75 were similar. RBPD were related to age in the case of FEV1 (p=0.005), FEF25 (p=0.02), FEF2575 (p=0.01) where older children had smaller RBPD. FVC RBPD was lower (p=0.01) in subjects with current wheeze while PEF RBPD was lower (p=0.02) in children with asthma. No cases of adverse events.Conclusion: In epidemiological studies of children, the position of spirometric testing does not seem to affect the result of lung function assessment or the safety level of the measuring procedure. ER -