Table 1.

Preoperative and operative characteristics of study population

Variable	n = 103 (%)
Preoperative anaemia
No	63 (61.2%)
Yes	40 (38.8%)
Status of surgical procedure
Elective	52 (50.5%)
Emergency	51 (49.5%)
Type of surgical procedure
Major	59 (57.3%)
Minor	44 (43.7%)
Type of anaesthesia
General	77 (74.8%)
Locoregional	16 (15.5%)
Regional	10 (9.7%)
Estimated blood loss (ml)
< 1000	94 (91.3%)
> 1000	9 (8.7%)
Surgical wound class
Non septic	70 (68%)
Septic	33 (32%)
Perioperative transfusion
No	86 (83.5%)
Yes	17 (16.5%)
Duration of surgical procedure (h)
≤ 2	82 (79.6%)
> 2	21 (20.4%)