Table 2.
Characteristics of SSIs in orthopedic surgery in six educational hospitals under study in Tehran from March 2017 to March 2018
| Variable | Post-discharge infection | Pre-discharge infection | Total | P_value |
|---|---|---|---|---|
| Sex | 0.152 | |||
| Female | 45 (83.33) | 9 (16.67) | 54 | |
| Male | 109 (73.65) | 39 (26.35) | 148 | |
| Vital status | 0.388 | |||
| live | 151 (76.65) | 46 (23.35) | 197 | |
| Dead | 3 (60.0) | 2 (40.0) | 5 | |
| Type of procedure | 0.218 | |||
| ORIF | 73 (79.35) | 19 (20.56) | 92 | |
| TKA | 16 (84.21) | 3 (15.79) | 19 | |
| THA | 9 (81.82) | 2 (18.18) | 11 | |
| Other orthopedic surgeries | 56 (70.0) | 24 (30.0) | 80 | |
| Bacteriology test | 0.001* | |||
| E. coli | 6 (75.0) | 2 (25.0) | 8 | |
| Entrobacter | 6 (37.50) | 10 (62.50) | 16 | |
| Klebsiella | 12 (54.55) | 10 (45.45) | 22 | |
| Pseudomonas aeruginosa | 6 (85.71) | 1 (14.29) | 7 | |
| Staph aureous | 18 (78.26) | 5 (21.74) | 23 | |
| Staph epidermis | 7 (87.50) | 1 (12.50) | 8 | |
| Acinetobacter | 3 (60.0) | 2 (40) | 5 | |
| Others1 | 9 (90.0) | 1 (10.0) | 10 | |
| Unknown | 87 (76.24) | 16 (15.53) | 103 | |
| Age (years) | 46 (33.75–62.25) | 38.5 (28–55.75) | 44 (32–62) | 0.076 |
| Time between surgery to infection (days) | 36.5 (20.5–85.5) | 9 (5.25–16) | 27.5 (14–60) | < 0.001* |
| Length of hospitalization due to orthopedic surgery (days)2 | 10 (6–17.25) | 13 (8–23) | 11 (7–19) | 0.052 |
| Duration of hospitalization due to infection (days) 3 | 17 (8–28) | 17 (7.25–30) | 17 (18–29) | 0.685 |
| Total | 154 (76.24) | 48 (23.76) | 202 (100) | – |
Data are n (%) or median (Q1-Q3).
1 Such as Cocci, Proteous, Candida, Streptococ viridans and Entrococus Faecium
2 Time between admission to discharge among the post-discharge infection group and duration between admission to detection of SSI among the pre-discharge infection cases
3 The duration between detection of SSI to discharge