RT Journal Article SR Electronic T1 Predictors of BTS Step 3 paediatric asthma prescribing JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP P1171 VO 44 IS Suppl 58 A1 Clare S. Murray A1 Stephen Turner A1 Mike Thomas A1 Kathryn Richardson A1 Annie Burden A1 Daniel West A1 David Price YR 2014 UL http://erj.ersjournals.com/content/44/Suppl_58/P1171.abstract AB Aim: To identify patient characteristics associated with British Thoracic Society (BTS) Step 3 prescribing options in paediatric asthma.Method: Clinical records of asthma patients aged 5–12yrs receiving inhaled corticosteroids(ICS)±reliever in the year prior to BTS Step 3 therapy initiation were selected from two UK research databases. Multivariate associations between characteristics in the pre step-up year were evaluated relative to addition of long-acting beta-agonist therapy (+LABA) using multinomial logistic regression.Results: Of 10974 cases, 58% had ICS increased (INC), 21% LABA added (+LABA); 10% switched to combination ICS/LABA (FDC) and 10% had leukotriene receptor antagonist added (+LTRA).View this table:Multivariate odds ratios relative to the +LABA cohort.Conclusion: Clinicians often deviate from guidance to add LABA at BTS Step 3. Here we identify factors that influence prescribing choice. On-going work will determine which options lead to better outcomes.