Parkinsonics: A Randomized, Blinded, Cross-Over Trial of Group Singing for Motor and Nonmotor Symptoms in Idiopathic Parkinson Disease

Figure 2

Boxplots of Rainbow S (singing first) and D (discussion) groups’ minimal loudness (in decibels, dB) for all timepoints. Boxes show medians and interquartile range (IQR) and whiskers show largest data value within 1.5 IQR above the third quartile and smallest data value within 1.5 IQR below the first quartile. Brackets and asterisked p values indicate statistical significance.