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Table 2 Incidence rate of deep incisional surgical site infections (SSI-D) considering age of patients, waiting time for surgery in days, duration of stay in the ward in days, number of days from surgery to SSI detection, detection before or after discharge from hospital, gender of patients in HPRO and KPRO endoprosthesis surgery in 2009–2013 vs 2014–2018

From: Multimodal strategy in surgical site infections control and prevention in orthopaedic patients – a 10-year retrospective observational study at a Polish hospital

Operation typeEndoprosthesisFracture reductionKnee arthroscopy, removal of fixation device and others
HPROKPROFXCRKARTUZ
Year2009–20132014–20182009–20132014–20182009–20132014–20182009–20132014–20182009–20132014–20182009–20132014–2018
Number of surgeries1491122434750013031356898724637669655588
Number of SSI-D16164927101966355
Incidence rate (%)1,11,31,21,82,10,72,10,80,90,40,80,9
OR (95%CI)1.2 (0.61 to 2.45)1.6 (0.48 to 5.15)0.4 (0.17 to 0.73)0.4 (0.15 to 0.97)0.5 (0.12 to 1.90)1.1 (0.32 to 3.87)
Fisher’s test; OR (95%CI)p = 0.740;p = 0.068;p < 0.01;p < 0.05;p = 0.232; 2.1 (0.5–8.4)p = 0.530; 0.9 (0.3–3.2)
Waiting time for operation in the ward [days]
 Median (Me); SD3 (2); 4,13 (2); 4,52 (2); 2,63 (2); 3,73 (2); 4,13 (2); 4,32 (1); 3,62 (1); 2,82 (1); 2,01 (1); 1,22 (1); 5,12 (1); 3,9
 ANOVA (p)p = 0,049p = 0.383p = 0.641p = 0,048p < 0.05p = 0.117
Duration of stay in the ward [days]
 Median (Me); SD13 (11); 6,612 (10); 7,513 (10); 7,313 (10); 8,210 (8); 8,68 (6); 7,38 (7); 6,86 (5); 5,24 (3); 3,44 (3); 2,45 (3); 9,03 (2); 4,9
 ANOVA (p)p = 0,047p = 0.543p < 0.001p < 0.001p = 0.186p < 0.001
Number of days from surgery to SSI detection
 Median (Me); SD47 (45); 36,143 (12); 73,925 (15); 20,052 (25); 88,341 (17); 47,950 (29); 46,361 (44); 57,434 (24); 31,326 (11); 31,624 (24); 5,59 (3); 14,311 (4); 17,0
 ANOVA (p)p = 0.840p = 0.627p = 0.617p = 0.293p = 0.919p = 0.876
SSI-D: diagnosis mode [n]
 Before discharge5 (31,3)8 (50,0)1 (25,0)4 (44,4)12 (46,2)1 (11,1)2 (10,5)3 (50,0)2 (33,3)0 (0,0)3 (60,0)2 (40,0)
 After discharge11 (68,7)8 (50,0)3 (75,0)5 (55,6)14 (53,8)8 (88,9)17 (89,5)3 (50,0)4 (66,7)3 (100)2 (40,0)3 (60,0)
 Fisher’s test; OR (95%CI)p = 0.238; 0.5 (0.11–1.92)p = 0.636; 0.4 (0.03–5.71)p = 0.066; 6.9 (0.75–62.96)p = 0.070; 0.1 (0.01–1.03)p = 0.417; n/ap = 0.50; 2.3 (0.18–28.26)
Patient age [years]
 Median (Me); SD67 (67); 12,370 (71); 11,869 (71); 8,869 (70); 8,160 (61); 21,761 (63); 21,554 (58); 22,155 (59); 21,235 (34); 13,033 (31); 12,946 (44); 22,344 (43); 18,8
 ANOVA (p)p < 0.001p = 0.538p = 0.212p = 0.507p < 0.01p = 0.183
Gender
 Female975 (64,7)721 (58,1)247 (71,2)374 (74,8)749 (56,3)752 (55,1)435 (47,4)325 (44,5)245 (38,1)203 (30,2)277 (40,7)223 (37,9)
 Male532 (35,3)519 (41,9)100 (28,8)126 (25,2)581 (43,7)614 (44,9)482 (52,6)405 (55,5)398 (61,9)469 (69,8)404 (59,3)365 (62,1)
 Fisher’s test; OR (95%CI)p < 0.001; 1.3 (1.13–1.54)p = 0.082; 0.8 (0.61–1.13)p = 0.267; 1.1 (0.90–1.23)p = 0.129; 1.1 (0.93–1.37)p < 0.01; 1.4 (1.13–1.79)p = 0.173; 1.1 (0.89–1.41)
  1. HPRO Hip Prosthesis, KPRO Knee Prosthesis, FX Open Reduction of Fracture, CR Closed Reduction of Fracture with Internal Fixation, KART knee arthroscopy, UZ removal of fixation device, OR Odds Ratio, SSI-D deep incisional surgical site infections, SD standard deviation, Me median, n/a not available;