Fig. 2From: Serial ultrasound assessment of diaphragmatic function and clinical outcome in patients with amyotrophic lateral sclerosisKaplan–Meyer curves for percentage of patients NIV-free (panel a) and percentage survival (panel b) during follow-up according to their normal (ΔTmax < 0.75) or abnormal (ΔTmax > 0.75) threshold levels of diaphragmatic dysfunction as assessed by the ultrasound monitoring techniqueBack to article page