Table 2. Patients’ basic condition and medical history before matching.
| Characteristic | Operation group | Nonoperation group | P value |
|---|---|---|---|
| Number of patients | 113 | 325 | |
| Age (years) | 66.60±5.80 | 67.33±5.53 | 0.017 |
| Male | 32 | 156 | 0.235 |
| Underlying disease | |||
| COPD | 2 | 7 | 0.718 |
| Asthma | 2 | 4 | 1.000 |
| Diabetes | 16 | 52 | 0.642 |
| Cardiovascular disease | 32 | 94 | 0.903 |
| Smoking | 36 | 104 | 0.978 |
| Number of fractures | 4.86±1.93 | 4.90±2.12 | 0.838 |
| Fracture comorbidity on admission | |||
| Lung infection | 23 | 63 | 0.823 |
| Pleural effusion | 60 | 170 | 0.885 |
| Pulmonary atelectasis | 23 | 62 | 0.767 |
| Pneumothorax | 24 | 91 | 0.159 |
| Lung contusion | 29 | 82 | 0.927 |
| AIS score | |||
| Chest | 3.06±0.65 | 3.16±0.55 | 0.107 |
| ISS | 12.71±0.53 | 13.33±6.16 | 0.366 |
| Visiting time | 3.34±4.16 | 4.16±8.52 | 0.324 |
Age, numbers of fractures, AIS score, ISS, and visiting time are presented as the mean ± standard deviation. COPD, chronic obstructive pulmonary disease; AIS, abbreviated injury scale; ISS, injury severity score.