SMN1 and amyotrophic lateral sclerosis: Therefore, we further analyzed the associations of diaphragm ultrasound imaging in comparison to established respiratory measures such as vital capacity, spirometry, respiratory subscore of the ALSFRSR, and daytime blood gases separately for ALS (Table 3, Supplement Table S2) and SMA (Table 4, Supplement Table S3) using partial correlations adjusted for age and BMI.