Table 3.
Abscess recurrence within 60 days
| Characteristic | Category | Univariable OR (95% c.i.), P | Multivariable OR (95% c.i.), P |
|---|---|---|---|
| Postoperative antibiotics | No | Reference | Reference |
| Yes—≥3 days total | 0.99 (0.56–1.76), 0.980 | 0.97 (0.53–1.74), 0.906 | |
| Yes—<3 days total | 0.62 (0.15–1.82, 0.446 | 0.64 (0.15–1.91), 0.478 | |
| Anaesthetic type | General anaesthetic | Reference | Reference |
| Local anaesthetic | 1.18 (0.65–2.08), 0.569 | 1.13 (0.60–2.04), 0.698 | |
| Age (years) | 18–25 | Reference | – |
| 26–35 | 1.32 (0.54–3.41), 0.544 | – | |
| 36–45 | 1.26 (0.48–3.37), 0.638 | – | |
| 46–55 | 1.41 (0.57–3.68), 0.464 | – | |
| 56–65 | 0.81 (0.24–2.48), 0.717 | – | |
| >65 | 0.83 (0.25–2.54), 0.746 | – | |
| Sex | Male | Reference | – |
| Female | 0.84 (0.48–1.47), 0.553 | – | |
| Smoking status | Current smoker | Reference | Reference |
| Previous smoker | 0.37 (0.11–0.99), 0.073 | 0.38 (0.11–1.02), 0.080 | |
| Never smoked | 0.62 (0.35–1.11), 0.105 | 0.67 (0.37–1.23), 0.191 | |
| BMI (kg/m2), mean(s.d.) | – | 1.05 (1.01–1.08), 0.006 | 1.04 (1.01–1.08), 0.015 |
| Hidradenitis suppurativa | No | Reference | – |
| Yes | 3.02 (1.33–6.21), 0.004 | 2.64 (1.13–5.62), 0.016 | |
| Immunosuppression | No | Reference | – |
| Yes | 0.99 (0.16–3.35), 0.985 | – | |
| Diabetes mellitus | No | Reference | – |
| Yes | 1.19 (0.55–2.31), 0.638 | – | |
| Abscess position | Abdominal wall—anterior | Reference | – |
| Abdominal wall—posterior | 0.67 (0.03–4.73), 0.726 | – | |
| Axilla | 0.67 (0.09–3.54), 0.651 | – | |
| Buttock | 1.39 (0.41–5.45), 0.605 | – | |
| Groin | 2.11 (0.66–8.02), 0.225 | – | |
| Lower limb—proximal | 1.52 (0.20–8.16), 0.640 | – | |
| Pilonidal | 1.76 (0.61–6.34), 0.331 | – | |
| Thorax—anterior | 1.57 (0.36–6.85), 0.536 | – | |
| Thorax—posterior | 0.51 (0.12–2.22), 0.354 | – | |
| Upper limb—proximal | 1.68 (0.43–7.00), 0.452 | – | |
| Other | 0.51 (0.03–3.57), 0.553 | – | |
| Maximum abscess diameter (cm), mean(s.d) | – | 0.98 (0.86–1.10), 0.776 | – |
| Presence of cellulitis | No | Reference | – |
| Yes | 1.05 (0.56–1.88), 0.874 | – | |
| Timing of hospital presentation | Daytime (08.00–16.59) | Reference | – |
| Evening (17.00–21.59) | 0.81 (0.35–1.68), 0.605 | – | |
| Night (22.00–07.59) | 0.89 (0.30–2.11), 0.806 | – | |
| Timing of surgery | First hospital presentation | Reference | – |
| Planned return presentation | 0.99 (0.53–1.75), 0.961 | – | |
| Surgical setting | Operating room | Reference | – |
| Emergency department | 4.54 (0.67–18.5), 0.059 | – | |
| Ward/treatment area | 1.19 (0.64–2.14), 0.564 | – | |
| Primary operator | Consultant | Reference | – |
| Junior surgical trainee | 0.73 (0.27–2.56), 0.577 | – | |
| Nurse practitioner | 0.59 (0.08–3.16), 0.548) | – | |
| Senior surgical trainee | 0.54 (0.20–1.90), 0.273 | – | |
| Abscess packed | No | Reference | – |
| Yes | 0.38 (0.21–0.72), 0.002 | 0.38 (0.20–0.74), 0.003 |
Analyses performed on cases without any missing data (n = 1047). Junior surgical trainee relates to postgraduate year 1–4 or junior clinical fellow and senior surgical trainee relates to postgraduate year 5–10 or senior clinical fellow.