Table 5.
Logistic regression analysis for assessment of the influencing factors (odds ratio) on the endpoints investigated
| Influencing factors | Surgical complications (90 days) | Recurrence procedure (91–365 days) | Pain management (365 days) | Mortality (30 days) |
|---|---|---|---|---|
| Volume categories (caseload annual) | ||||
| I (1–50) | 0.94 (0.79–1.13) | 1.53 (1.17–1.98) | 1.09 (0.93–1.28) | 1.00 (0.55–1.82) |
| II (51–75) | 1.01 (0.90–1.14) | 1.24 (1.01–1.55) | 1.03 (0.91–1.16) | 1.06 (0.71–1.58) |
| III (76–100) | 1.01 (0.91–1.12) | 1.10 (0.91–1.34) | 0.97 (0.87–1.07) | 1.11 (0.82–1.50) |
| IV (101–125) | 0.94 (0.85–1.05) | 0.93 (0.77–1.12) | 1.02 (0.93–1.12) | 0.83 (0.59–1.17) |
| V (≥ 126) | 1 (reference) | 1 (reference) | 1 (reference) | 1 (reference) |
| Age in years | ||||
| 18–44 | 1 (reference) | 1 (reference) | 1 (reference) | 1 (reference) |
| 45–55 | 1.20 (1.07–1.35) | – | 1.93 (1.69–2.21) | – |
| 56–64 | 1.31 (1.16–1.49) | – | 2.05 (1.79–2.35) | – |
| 65–75 | 1.51 (1.35–1.69) | – | 1.96 (1.71–2.25) | 4.98 (2.95–8.41) |
| 76–102 | 1.81 (1.60–2.04) | 0.78 (0.66–0.92) | 2.46 (2.14–2.83) | 13.7 (8.47–22.16) |
| Risk factors and surgical technique | ||||
| Gender (female) | – | – | 1.54 (1.40–1.68) | – |
| Recurrence present on admission | 1.32 (1.22–1.44) | 1.36 (1.17–1.59) | 1.20 (1.10–1.32) | – |
| Incarceration | 1.71 (1.58–1.85) | – | – | 2.40 (1.73–3.33) |
| Gangrene | 2.17 (1.62–2.89) | – | – | 2.77 (1.46–5.25) |
| Emergency | – | – | – | 1.86 (1.32–2.63) |
| Bilateral operation | 1.23 (1.12–1.35) | 1.58 (1.38–1.81) | 1.12 (1.02–1.24) | – |
| Intestinal procedure | 3.77 (2.78–5.12) | – | – | 1.97 (1.17–3.30) |
| Umbilical hernia repair | – | – | – | 2.03 (1.16–3.55) |
| Femoral hernia repair | 1.51 (1.05–2.17) | 2.12 (1.12 – 4.00) | – | – |
| Incisional hernia repair | 1.78 (1.22–2.58) | – | – | – |
| Preoperative therapy with systemic glucocorticoids | 1.29 (1.09–1.52) | – | 2.04 (1.70–2.46) | 2.15 (1.35–3.41) |
| Preoperative antithrombotic therapy | 1.11 (1.01–1.21) | – | 1.16 (1.06–1.28) | – |
| Day care surgical repair | – | – | – | 0.09 (0.01–0.62) |
| Open mesh procedure | 0.63 (0.51–0.78) | 0.42 (0.34–0.52) | – | 0.52 (0.39–0.70) |
| Minimally invasive mesh procedure | 0.48 (0.38–0.60) | 0.51 (0.41–0.62) | 0.91 (0.84–0.98) | 0.22 (0.15–0.33) |
| BMI and Elixhauser comorbidities | ||||
| Grade II obesity | 1.63 (1.30–2.06) | – | 1.70 (1.32–2.20) | – |
| Grade III obesity | 3.25 (2.41–4.40) | – | 2.49 (1.72–3.60) | – |
| Grade obesity unspecified | – | – | 1.65 (1.06–2.55) | – |
| Alcohol abuse | – | – | 2.05 (1.55–2.73) | – |
| Cardiac arrhythmia | 1.36 (1.23–1.50) | – | – | 1.63 (1.25–2.12) |
| Congestive heart disease | 1.17 (1.03–1.32) | – | 1.34 (1.16–1.54) | 2.41 (1.79–3.24) |
| Coagulopathy | 2.51 (2.20–2.86) | – | – | 2.27 (1.62–3.17) |
| Chronic lung disease | – | – | 1.51 (1.35–1.70) | – |
| Deficiency anemia | 1.70 (1.17–2.47) | – | – | – |
| Depression | 1.43 (1.20–1.71) | – | 1.39 (1.13–1.71) | – |
| Diabetes, with complications | – | – | 1.39 (1.04–1.86) | – |
| Diabetes, no complications | 1.13 (1.03–1.24) | – | 1.21 (1.09–1.35) | – |
| Drug abuse | – | 3.43 (1.61–7.28) | 2.40 (1.40–4.13) | – |
| Disorders of the water and electrolyte balance as well as of the acid–base balance | 3.04 (2.65–3.48) | 1.65 (1.17–2.32) | 1.26 (1.05–1.51) | 3.73 (2.82–4.95) |
| Hypertension, with complications | 0.76 (0.61–0.94) | – | – | 0.38 (0.23–0.63) |
| Hypertension, no complications | – | – | 1.18 (1.09–1.28) | 0.59 (0.47–0.75) |
| Liver disease | 2.33 (1.89–2.86) | – | – | 4.86 (2.99–7.91) |
| Other neurologic diseases | – | – | – | 1.62 (1.05–2.52) |
| Paralysis | – | – | 1.49 (1.09–2.03) | – |
| Pulmonary heart disease and diseases of the pulmonary circulation | 1.61 (1.18–2.19) | – | – | 1.81 (1.04–3.14) |
| Peripheral occlusive vascular disease | – | – | 1.41 (1.19–1.67) | – |
| Real failure/insufficiency | 1.26 (1.12–1.43) | – | – | 1.52 (1.14–2.04) |
| Rheumatoid disease | – | – | 2.02 (1.52–2.68) | – |
| Heart valve disease | 1.26 (1.07–1.49) | – | – | – |
| Weight loss | 1.94 (1.34–2.82) | – | – | 2.40 (1.29–4.46) |
Risk factors denoted by “–“were not included in risk adjustment because of a lack of significance