Correction to: npj Primary Care Respiratory Medicine https://doi.org/10.1038/s41533-018-0096-4; Published online 18 July 2018

In the PDF and HTML versions of this Brief Communication a couple of words are not shown in a sentence in the penultimate sentence of the first paragraph of the Results, changing the meaning. This sentence should have been “The setting of a SABA use threshold was likened to “tossing a coin” (Expert 3, primary care).”