表 3. Comparison of VAS scores at rest and on coughing in three groups (
).
三组患者各时点静息状态和咳嗽时VAS评分的比较（
）
| Group | n | T1 | T2 | T3 | T4 | T5 |
| a P<0.05, b P<0.01, vs. control group; c P<0.05, vs. R group. | ||||||
| At rest | ||||||
| Control | 43 | 4.8±0.8 | 4.5±0.8 | 4.2±0.7 | 3.5±0.6 | 3.2±0.5 |
| R | 43 | 3.6±0.5a | 3.5±0.4a | 3.1±0.4a | 2.5±0.4a | 2.2±0.3a |
| RD | 43 | 2.9±0.6b, c | 2.6±0.5b, c | 2.3±0.5b, c | 2.2±0.4a | 2.0±0.4a |
| On counghing | ||||||
| Control | 43 | 5.8±0.9 | 5.5±0.8 | 5.1±0.7 | 4.5±0.6 | 4.3±0.5 |
| R | 43 | 4.7±0.7a | 4.5±0.6a | 4.1±0.6a | 3.8±0.5 | 3.6±0.5 |
| RD | 43 | 3.6±0.7b, c | 3.4±0.6b, c | 3.3±0.6b | 3.2±0.5 | 3.0±0.5 |