In a recent study, British researchers compared the different types of measurements for analyzing the strength of the breathing muscles in patients with ALS. 

The patients had been part of a previously published study, in which researchers had measured respiratory muscle strength. Looking at how the various measurements were linked to survival and ventilation-free survival, the team noted that each muscle strength assessment could predict survival individually.

Analyzing all the measurements in a single analysis, the research team could identify the measures that were linked most strongly to survival without the need for mechanical ventilation. Three types of invasive and one noninvasive method were among the measurements that best mirrored ventilation-free survival.

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