Table 3. Crude and adjusted Risk Ratio for survival, by demographic and selected clinical variables and adjusteda by age, BMI and site of onset.
| Risk Ratio—RR (CI 95%) | ||||
|---|---|---|---|---|
| Crude | p-value | Adjusteda | p-value | |
| Age (years) | 0.01 | 0.001 | ||
| < 50 | 1 | - | 1 | - |
| 51–60 | 1.53 (0.66–3.56) | 0.31 | 1.37 (0.59–3.19) | 0.46 |
| 61–75 | 1.83 (0.80–4.17) | 0.15 | 1.90 (0.83–4.39) | 0.13 |
| > 75 | 6.70 (2.02–22.24) | 0.001 | 12.47 (3.51–44.26) | < 0.0001 |
| BMI (kg/m 2 ) | 0.03 | 0.006 | ||
| < 25 | 2.59 (1.08–6.23) | 0.03 | 3.56 (1.44–8.86) | 0006 |
| ≥ 25 | 1 | - | 1 | - |
| Site of onset | 0.003 | 0.0002 | ||
| Spinal | 1 | - | 1 | - |
| Bulbar | 2.97 (1.44–6.14) | 0.003 | 4.56 (2.06–10.12) | 0.0002 |