Operation type | Endoprosthesis | Fracture reduction | Knee arthroscopy, removal of fixation device and others | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
HPRO | KPRO | FX | CR | KART | UZ | |||||||
Year | 2009–2013 | 2014–2018 | 2009–2013 | 2014–2018 | 2009–2013 | 2014–2018 | 2009–2013 | 2014–2018 | 2009–2013 | 2014–2018 | 2009–2013 | 2014–2018 |
Number of surgeries | 1491 | 1224 | 347 | 500 | 1303 | 1356 | 898 | 724 | 637 | 669 | 655 | 588 |
Number of SSI-D | 16 | 16 | 4 | 9 | 27 | 10 | 19 | 6 | 6 | 3 | 5 | 5 |
Incidence rate (%) | 1,1 | 1,3 | 1,2 | 1,8 | 2,1 | 0,7 | 2,1 | 0,8 | 0,9 | 0,4 | 0,8 | 0,9 |
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); SD | 3 (2); 4,1 | 3 (2); 4,5 | 2 (2); 2,6 | 3 (2); 3,7 | 3 (2); 4,1 | 3 (2); 4,3 | 2 (1); 3,6 | 2 (1); 2,8 | 2 (1); 2,0 | 1 (1); 1,2 | 2 (1); 5,1 | 2 (1); 3,9 |
ANOVA (p) | p = 0,049 | p = 0.383 | p = 0.641 | p = 0,048 | p < 0.05 | p = 0.117 | ||||||
Duration of stay in the ward [days] | ||||||||||||
Median (Me); SD | 13 (11); 6,6 | 12 (10); 7,5 | 13 (10); 7,3 | 13 (10); 8,2 | 10 (8); 8,6 | 8 (6); 7,3 | 8 (7); 6,8 | 6 (5); 5,2 | 4 (3); 3,4 | 4 (3); 2,4 | 5 (3); 9,0 | 3 (2); 4,9 |
ANOVA (p) | p = 0,047 | p = 0.543 | p < 0.001 | p < 0.001 | p = 0.186 | p < 0.001 | ||||||
Number of days from surgery to SSI detection | ||||||||||||
Median (Me); SD | 47 (45); 36,1 | 43 (12); 73,9 | 25 (15); 20,0 | 52 (25); 88,3 | 41 (17); 47,9 | 50 (29); 46,3 | 61 (44); 57,4 | 34 (24); 31,3 | 26 (11); 31,6 | 24 (24); 5,5 | 9 (3); 14,3 | 11 (4); 17,0 |
ANOVA (p) | p = 0.840 | p = 0.627 | p = 0.617 | p = 0.293 | p = 0.919 | p = 0.876 | ||||||
SSI-D: diagnosis mode [n] | ||||||||||||
Before discharge | 5 (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 discharge | 11 (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/a | p = 0.50; 2.3 (0.18–28.26) | ||||||
Patient age [years] | ||||||||||||
Median (Me); SD | 67 (67); 12,3 | 70 (71); 11,8 | 69 (71); 8,8 | 69 (70); 8,1 | 60 (61); 21,7 | 61 (63); 21,5 | 54 (58); 22,1 | 55 (59); 21,2 | 35 (34); 13,0 | 33 (31); 12,9 | 46 (44); 22,3 | 44 (43); 18,8 |
ANOVA (p) | p < 0.001 | p = 0.538 | p = 0.212 | p = 0.507 | p < 0.01 | p = 0.183 | ||||||
Gender | ||||||||||||
Female | 975 (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) |
Male | 532 (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) |