| Stratification 1: Age = “18–60” |
| ≥200 |
91 |
30 (33.0%) |
1 |
0.094 |
9(9.9%) |
1 |
P = 1.000 |
| <200 |
30 |
15 (50.0%) |
2.033 [0.879–4.703] |
|
3 (10.0%) |
1.012 [0.255–4.012] |
| Stratification 1: Age = “>60” |
| ≥200 |
34 |
12 (35.3%) |
1 |
0.036 |
3 (8.8%) |
1 |
P = 0.902 |
| <200 |
13 |
9 (69.2%) |
4.125 [1.046–16.263] |
|
2 (15.4%) |
1.879 [0.276–12.775] |
| Stratification 2: Erythrocytes = male ≥ 4.00/ml, or female ≥ 3.50/ml |
| ≥200 |
57 |
21 (36.8%) |
1 |
P = 0.683 |
4 (7.0%) |
1 |
P = 0.195 |
| <200 |
19 |
8 (42.1%) |
1.247 [0.433–3.591] |
4 (21.1%) |
3.533 [0.789–15.832] |
| Stratification 2: Erythrocytes = male < 4.00/ml, or female < 3.50/ml |
| ≥200 |
68 |
21 (30.9%) |
1 |
P = 0.002 |
8 (11.8%) |
1 |
P = 0.498 |
| <200 |
24 |
16 (66.7%) |
4.476 [1.659–12.076] |
1 (4.2%) |
0.326 [0.039–2.754] |
| Stratification 3: Hemoglobin = male ≥ 120 g/L, or female ≥ 110 g/L |
| ≥200 |
79 |
25 (31.6%) |
1 |
P = 0.087 |
6 (7.6%) |
1 |
P = 1.000 |
| <200 |
19 |
10 (52.6%) |
2.400 [0.867–6.641] |
2 (10.5%) |
1.431 [0.265–7.719] |
| Stratification 3: Hemoglobin = male < 120 g/L, or female < 110 g/L |
| ≥200 |
46 |
17 (37.0%) |
1 |
P = 0.087 |
6 (13.0%) |
1 |
P = 1.000 |
| <200 |
24 |
14 (58.3%) |
2.388 [0.871–6.547] |
3 (12.5%) |
0.952 [0.216–4.197] |
| Stratification 4: Incision classification = clean incision |
| ≥200 |
86 |
24 (27.9%) |
1 |
P = 0.051 |
5 (5.8%) |
1 |
P = 1.000 |
| <200 |
15 |
8 (53.3%) |
2.952 [0.965–9.035] |
1 (6.7%) |
1.157 [0.126–10.662] |
| Stratification 4: Incision classification = possible contaminated or contaminated incision |
| ≥200 |
39 |
18 (46.2%) |
1 |
P = 0.522 |
7 (17.9%) |
1 |
P = 0.750 |
| <200 |
28 |
16 (57.1%) |
1.556 [0.585–4.137] |
4 (14.3%) |
0.762 [0.200–2.903] |
| Stratification 5: Type of surgery of admission = elective |
| ≥200 |
68 |
22 (32.4%) |
1 |
P = 0.264 |
8 (11.8%) |
1 |
P=1.000 |
| <200 |
22 |
10 (45.5%) |
1.742 [0.653–4.647] |
3 (13.6%) |
1.184 [0.285–4.917] |
| Stratification 5: Type of surgery of admission = emergency |
| ≥200 |
57 |
20 (35.1%) |
1 |
P = 0.013 |
4 (7.0%) |
1 |
P = 1.000 |
| <200 |
21 |
14 (66.7%) |
3.700 [1.285–10.657] |
2 (9.5%) |
1.395 [0.236–8.241] |
