Fig. 3From: Inhaler devices in asthma and COPD patients – a prospective cross-sectional study on inhaler preferences and error ratesNumber of attempts to error-free use | Number of attempts (mean) that patients needed until the inhaler device was used correctly. The dotted line shows the mean of attempts to error-free use across all 10 devices (1.22). None of the devices achieved a significantly lower error rate than othersBack to article page