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Table 1 Patient characteristics

From: Using respiratory rate and thoracic movement to assess respiratory insufficiency in amyotrophic lateral sclerosis: a preliminary study

  Group 1 (n=22) Group 2 (n=20)  
  Median Range Median Range p
Age at diagnosis (years) 69 49–83 69 54–85 0.9
Duration from the first symptoms to diagnosis (months) 11 1–48 13 3–60 0.8
Duration from the diagnosis to initiation of NIV (months) 2 0–5 12 6–29 < 0.001
  1. The difference between the groups was assessed using the Mann Whitney U test.
  2. NIV = non-invasive ventilation.