Fig. 2From: Natural history of lung function in spinal muscular atrophyLongitudinal changes of FVC in SMA. Legend: Linear mixed-model (coloured lines) and non-linear (black) analyses of longitudinal changes in FVC stratified by SMA type. Solid regression lines indicate the mean values of FVC and its mean rate of decline over time. Shades represent 95% confidence intervals for the mean rates of decline. n = number of patients; obs = number of observationsBack to article page