Patients age, BMI, time of surgery and hospital stay in cases with and without infection
| Without infection (n = 790) | Infected (n = 4) | 95% CI | |||||||
|---|---|---|---|---|---|---|---|---|---|
| M | SD | M | SD | t | p | LL | UL | d Cohena | |
| Age (years) | 37.15 | 15.81 | 45.25 | 15.48 | −1.02 | 0.307 | −23.65 | 7.46 | 0.51 |
| BMI | 25.30 | 4.49 | 26.15 | 3.36 | −0.38 | 0.706 | −5.26 | 3.56 | 0.19 |
| Time of surgery (minutes) | 84.85 | 47.88 | 118.75 | 55.13 | −1.41 | 0.158 | −81.04 | 13.24 | 0.71 |
| Length of stay in the hospital (days) | 2.11 | 0.92 | 4.50 | 2.52 | −1.90 | 0.154 | −6.39 | 1.62 | 2.57 |
Knee-only arthroscopies - with and without infection
| Without infection (n = 641) | Infected (n = 3) | 95% CI | |||||||
|---|---|---|---|---|---|---|---|---|---|
| M | SD | M | SD | t | p | LL | UL | d Cohena | |
| Age (years) | 36.52 | 15.93 | 39.33 | 12.22 | −0.31 | 0.760 | −20.90 | 15.27 | 0.18 |
| BMI | 25.16 | 4.34 | 24.83 | 2.56 | 0.13 | 0.898 | −4.61 | 5.25 | 0.07 |
| Time of surgery (minutes) | 80.64 | 49.02 | 91.67 | 12.58 | −0.39 | 0.697 | −66.65 | 44.60 | 0.23 |
| Length of stay in the hospital (days) | 2.15 | 0.94 | 3.33 | 1.15 | −2.19 | 0.029 | −2.25 | −0.12 | 1.26 |
Demographic data, details of surgery, risk factors for SAAA in infected cases
| DATA ANALYSED | Patient's initials | |||
|---|---|---|---|---|
| JK | MB | EW | HG | |
| Area of the body, procedure | knee, arthrolysis | knee, arthrolysis | knee, ACL reconstruction | shoulder, rotator cuff reconstruction |
| Age (years) | 42 | 50 | 26 | 63 |
| Sex (M-male; F-female) | M | M | F | F |
| Primary/revision | revision | revision | revision | primary |
| Using of non-resorbable implant | no | no | yes | yes |
| Using of drains | yes | yes | yes | no |
| Time of surgery (hours : minutes) | 01:45 | 01:30 | 01:20 | 03:20 |
| BMI | 26.6 | 26 | 21.9 | 30 |
| Length of stay in the hospital | 4 days | 4 days | 2 days | 8 days |
| Onset of infection from index operation | 7 days | 13 days | 47 days | 5 month 2 weeks |
| Pathogen | Enterobacter cloacae | Staphylococcus lugdunensis | Propionibacterium acnes | unknown |
Demographic characteristics of 794 elective arthroscopies analyzed for postoperative infection
| DATA ANALYSED | OPERATED JOINT | |||||||
|---|---|---|---|---|---|---|---|---|
| Knee | Shoulder | Hip | Ankle | Wrist | MTP joint | Elbow | ||
| Number of analyzed cases | 794 | 644 | 65 | 52 | 22 | 6 | 3 | 2 |
| Age – years (mean. SD. range) | 37.19±15.8 (7–79) | 36.51±15.9 (7–79) | 42.63±16.91 (15–78) | 36.81±10.7 (14–65) | 43.77±14.9 (23–78) | 27.33±14.4 (13–52) | 46.67±10.4 (37–61) | 16.5±11.5 (15–38) |
| Sex | F274 : M520 | F226 : M418 | F16 : M49 | F16 : M49 | F6 : M16 | F4 : M2 | F1 : M2 | F0 : M2 |
| Primary Revision | 83.8% (665 vs. 129) | 81.5% (525 vs. 119) | 100% (65 vs.0) | 100% (52 vs.0) | 63.63%% (14 vs.8) | 100% (6 vs.0) | 100% (3 vs.0) | 100% (2 vs.0) |
| The use of nonabsorbable implant (%) | 55.8% (443 vs.351) | 54.66% (352 vs.292) | 72.31% (47 vs.18) | 72.31% (47 vs.18) | 0% (0 vs.22) | 0% (0 vs.6) | 0% (0 vs.3) | 0% (0 vs.2) |
| The use of drains (%) | 85.26% (677 vs. 117) | 99.38% (640 vs.4) | 21.54% (14 vs.51) | 21.54% (14 vs.51) | 95.45%% (21 vs.1) | 0% (0 vs.6) | 0% (0 vs.3) | 0% (0 vs.2) |
| Time of surgery (mean. SD. range) | 1:25±00:48 (00:15–5:35) | 1:20±00:49 (00:15–5:35) | 1:25±00:47 (00:30–3:20) | 1:58±00:30 (01:15–3:20) | 1:43±00:39 (00:45–3:20) | 1:14±00:13 (00:55–01:30) | 00:52±00:09 (00:40–01:00) | 1:00±00:20 (00:40–01:20) |
| BMI (mean. SD. range) | 25.3±4.48 (14–45.44) | 25.15±4.33 (14–45.44) | 26.56±5.4 (17.4–39.8) | 25.2±4.34 (17.2–38.06) | 27.12±5.14 (19.7–40.6) | 23.77±2.37 (21.4–28.3) | 22.05±4.51 (18.38–28.4) | 24.47±5.37 (19.1–29.83) |
| Length of stay in the hospital (mean. SD. range) | 2.12±0.94 (1–8) | 2.15±0.93 (1–7) | 2±1.13 (1–8) | 1.87±0.7 (1–3) | 2.41±0.83 (1–4) | 1.5±0.5 (1–2) | 2.33±0.47 (2–3) | 2±0 (2) |
Comparison of 129 revision and 665 non-revision cases with regard to patients age, BMI, time of surgery and hospital stay
| Primary (n = 665) | Revision (n = 129) | 95% CI | |||||||
|---|---|---|---|---|---|---|---|---|---|
| M | SD | M | SD | t | p | LL | UL | d Cohena | |
| Age | 38.14 | 16.31 | 32.29 | 11.81 | 4.80 | <0.001 | 3.45 | 8.24 | 0.37 |
| BMI | 25.41 | 4.50 | 24.75 | 4.39 | 1.52 | 0.130 | −0.19 | 1.50 | 0.15 |
| Time of surgery (minutes) | 82.51 | 45.11 | 97.95 | 59.00 | −2.82 | 0.005 | −26.26 | −4.61 | 0.32 |
| Length of stay in the hospital (days) | 2.08 | 0.92 | 2.35 | 1.04 | −2.72 | 0.007 | −0.46 | −0.07 | 0.29 |