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Table 2 Main results for deep, superficial and any infection

From: Infection rates associated with epidural indwelling catheters for seven days or longer: systematic review and meta-analysis

  Site of infection
  Deep Superficial Any catheter-related
Number of studies 12 9 9
Number of patients with infections 57 194 257
Total number of patients 4628 4235 4235
Percentage of patients with infection 1.2 4.6 6.1
Risk of infection per 1000 catheter days 0.4 1.8 2.4
Mean days of catheter use before one infection occurs 2391 561 425
  1. Note that the infection rate for deep plus superficial numbers and percentages does not necessarily equal that for any catheter-related infection because of different numerators and denominators