1. Tunnelling of thoracic epidural catheters is associated with fewer catheter-related infections: a retrospective registry analysis 
H Bomberg, C Kubulus, S Herberger, S Wagenpfeil, P Kessler, T Steinfeldt, T Standl, A Gottschalk, J Stork, W Meissner, J Birnbaum, T Koch, D.I. Sessler, T Volk, A Raddatz 
British Journal of Anaesthesia 
Volume 116, Issue 4, Pages (April 2016)
DOI: /bja/aew026
Copyright © 2016 The Author(s) Terms and Conditions

2. Fig 1
Patient selection.
British Journal of Anaesthesia  , DOI: ( /bja/aew026)
Copyright © 2016 The Author(s) Terms and Conditions

3. Fig 2
Subgroup analysis for any grade of infection. The number needed to treat (NNT) was calculated for patients with no tunnelling in comparison with tunnelling. Odds ratios (OR) with 95% confidence interval (CI) and adjusted (adj) for potential confounders. Adjusted for age, ASA score (American Society of Anesthesiologists physical status score), catheter duration, multiple skin puncture before tunnelling, year of surgery, hospital, and surgical department (general surgery, gynaecology, traumatology/orthopaedics, urology, and other departments). Multiple skin puncture before tunnelling was not adjusted for multiple skin puncture before tunnelling. ASA score ≥2 was not adjusted for ASA score. Age ≥65 years was not adjusted for age. Prolonged catheter duration was not adjusted for catheter duration.
British Journal of Anaesthesia  , DOI: ( /bja/aew026)
Copyright © 2016 The Author(s) Terms and Conditions