Effect of cyclic stretching on bronchial responsiveness.

Data are quoted as the mean ± SEM, the standardized effect size (d) and the latter's 95% confidence interval (CI) for the difference between means. ACh, acetylcholine; 2ΔEmax (efficacy): the difference between the maximum bronchial contraction obtained with 3 × 10–3 M ACh and the basal tone recorded just before the dose-response curve was established (Fig 2);-log EC50 (potency), negative log of the ACh concentration producing 50% of the maximum effect.*P **P ***P †P ††P †††P Effect of cyclic stretching on bronchial responsiveness.