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. 2023 Apr 3;13(4):942. doi: 10.3390/life13040942

Figure 4.

Figure 4

Kaplan-Meier analysis of length of tracheostomy-free survival from symptom onset in oALS patients by (A) diagnostic delay (≤ or >12 months); (B) ALSFRS-R score at diagnosis (≤ or > 28/48); (C) age classes (< or ≥ 85 years).