In-hospital results
The results analyzed correspond to the matched groups. The non-matched group results are displayed in the corresponding tables but are not commented in the manuscript.
Overall in-hospital mortality was 1.3% (9 cases). The cause of death was: cardiac (4 cases, 44%), sepsis (3 cases, 34%), neurological (1 case, 11%), and respiratory (1 case, 11%). In-hospital mortality was similar in the two groups: SIMA 2%, BIMA 1% (p = 0.18). (Table 4)
The multivariate regression model identified previous hemodialysis (p = 0.02, OR 0.03, CI 95% 0.1-0.5) as risk factor for in-hospital mortality.
Complications in the immediate postoperative period were equivalent in the two groups, except for neurological complications (1% vs. 0%, p = 0.05) and leg wound infection (4% vs. 1%, p = 0.001), which were significantly higher in the SIMA group (Table 4). The incidence of DSWI was only 2% (17 patients) and was equivalent in the two groups. Of those, 10 patients were treated conservatively and, only 7 (1%) required reoperation for wound debridement and/or resuturing. (Table 4)
Postoperative neurological complications (p = 0.002, OR 8.9, CI 95% 5.1 – 13.8) and postoperative hemofiltration (p = 0.001, OR 36.9, CI 4.9 – 27.6) were identified by the multivariate regression model as risk factors for in-hospital mortality.