Table 5 Comparison of subject demographics between the two groups
From: Should preoperative computed tomography be routine examination for cervicofacial space infections?
| Study variables | All | Preoperative CT | Non-preoperative CT | T/χ2 | P-value |
|---|---|---|---|---|---|
| Sample size, n (%) | 153 (100%) | 108 (70.6) | 45 (29.4) | NA | NA |
|
Age (year), mean ± SD | 51.7 ± 17.4 | 53.3 ± 17.2 | 47.9 ± 17.6 | 1.75 | 0.08 |
| Gender, n (%) | |||||
| Women | 59 (38.6) | 42 (38.9) | 17 (37.8) | 0.02 | 0.9 |
| Men | 94 (61.4) | 66 (61.1) | 28 (62.2) | ||
| Diabetes mellitus, n (%) | |||||
| Yes | 19 (12.4) | 14 (13.0) | 5 (11.1) | 0.1 | 0.75 |
| No | 134 (87.6) | 94 (87.0) | 40 (88.9) | ||
| WBC > 10.0 × 109/L, n (%) | |||||
| Yes | 131 (85.6) | 91 (84.3) | 40 (88.9) | 0.55 | 0.46 |
| No | 22 (14.4) | 17 (15.7) | 5 (11.1) | ||
| Tracheotomy received before surgery, n (%) | |||||
| Yes | 11 (7.2) | 9 (8.3) | 2 (4.4) | 0.26a | 0.61 |
| No | 142 (92.8) | 99 (91.7) | 43 (95.6) | ||
| “Red flag” signs, n (%) | |||||
| Yes | 61 (39.9) | 46 (42.6) | 15 (33.3) | 1.14 | 0.29 |
| No | 92 (60.1) | 62 (57.4) | 30 (66.7) | ||
| Involved deep spaces ≥ 2, n (%) | |||||
| Yes | 57 (37.3) | 41 (38.0) | 16 (35.6) | 0.08 | 0.78 |
| No | 96 (62.7) | 67 (62.0) | 29 (64.4) | ||
|
Pearson χ2 test, continuity χ2 test, and Student-t test were used for analysis “Red flag” signs: either dyspnea, the elevated floor of mouth, or dysphagia presented NA not applicable, SD standard deviation, WBC white blood cell count aContinuity χ2 test | |||||