From: Surgical site infections in Italian Hospitals: a prospective multicenter study
 | In-hospital period | Post-discharge period | ||||
---|---|---|---|---|---|---|
Variable | Total § | No. SSI/total§ | Odds Ratio (95% CI^^) | Total§S | No. SSI/total §§ | Odds Ratio (95% CI^^) |
Gender | Â | Â | Â | Â | Â | Â |
   Male | 4,665 | 67/1,625 | 1.57 (1.12–2.21)* | 4,258 | 30/1,454 | 0.92 (0.58–1.45)# |
   Female |  | 81/3,040 |  |  | 63/2,804 |  |
Age (years) | Â | Â | Â | Â | Â | Â |
   18–36 |  | 15/1,163 | 1 |  | 20/1,086 | 1 |
   37–54 | 4,420 | 26/1,057 | 1.93 (0.98–3.84)# | 4,027 | 19/978 | 1.06 (0.54–2.08)# |
   55–70 |  | 44/1,162 | 3.01 (1.62–5.69)* |  | 23/1,063 | 1.18 (0.62–2.25)# |
   >70 |  | 60/1,038 | 4.70 (2.58–8.68)* |  | 28/900 | 1.71 (0.93–3.18)# |
Emergency Intervention | Â | Â | Â | Â | Â | Â |
 | 4,655 |  |  | 4,258 |  |  |
   Yes |  | 51/1,002 | 1.97 (1.37–2.82)* |  | 18/903 | 0.89 (0.51–1.53)# |
   No |  | 97/3,653 |  |  | 75/3,355 |  |
NNIS score § |  |  |  |  |  |  |
 |  | 4/358 | 1 |  | 4/336 | 1 |
   M |  | 38/2,621 | 1.30 (0.44–4.32)# |  | 52/2,459 | 1.79 (0.62–5.87)# |
 | 4,579 |  |  | 4,166 |  |  |
   0 |  | 65/1,260 | 4.81 (1.67– |  | 25/1,108 | 1.92 (0.63–6.54)# |
   1 |  | 30/340 | 15.63)* |  | 11/263 | 3.62 (1.05– |
   2 + 3 |  |  | 11.42 (3.86–38)* |  |  | 13.65)* |
Prosthesis | Â | Â | Â | Â | Â | Â |
   Yes | 4,652 | 6/801 | 0.20 (0.08–0.46)* | 4,245 | 17/756 | 1.03 (0.58–1.80)# |
   No |  | 142/3,851 |  |  | 76/3,489 |  |
Pre-operative hospital stay (days) | 4,589 | Â | Â | 4,196 | Â | Â |
 |  | 72/3,300 |  |  | 58/3,064 |  |
   0–1 |  | 69/1,289 | 2.54 (1.79–3.60)* |  | 33/1,132 | 1.56 (0.99–2.45)* |
   >1 |  |  |  |  |  |  |
Drains | Â | Â | Â | Â | Â | Â |
   No |  | 41/3,045 | 1 |  | 56/2,853 | 1 |
   1–3 days | 4,665 | 19/764 | 1.87 (1.04–3.33)* | 4,261 | 12/686 | 0.89 (0.45–1.72)# |
   >3 days |  | 88/856 | 8.40 (5.66–12.48)* |  | 23/722 | 1.64 (0.97–2.75)* |
Perioperativ e antibiotic prophylaxis | 4,665 | Â | Â | 4,258 | Â | Â |
   Yes |  | 139/4,071 | 0.44 (0.21–0.89)* |  | 74/3,718 | 1.80 (1.04–3.07)* |
   No |  | 9/594 |  |  | 19/540 |  |