| 组别 | n | 咳嗽 | 胸痛 | 血痰 | 食少 | 乏力 | 气短 |
| A组 | 50 | 27 (54.00) | 12 (24.00) | 20 (40.00) | 18 (36.00) | 27 (54.00) | 27 (54.00) |
| B组 | 50 | 37 (74.00) | 37 (74.00) | 30 (60.00) | 38 (76.00) | 37 (74.00) | 38 (76.00) |
| χ2 |
| 4.340 | 25.010 | 4.000 | 16.234 | 4.340 | 5.319 |
| P |
| 0.037 | <0.001 | 0.046 | <0.001 | 0.037 | 0.021 |