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Table 3 Comparison on the EVD use between two groups

From: The risk factors of intracranial infection in patients with intracerebral hemorrhage undergone hematoma puncture: what should we care

Factors Infection group(n = 52) No infection group(n = 508) χ2 p
Duration of EVD (days) < 7 6 (11.54%) 317 (62.40%) 9.037 0.002
  7–14 41 (78.85%) 173 (34.05%)
  > 14 5 (9.61%) 18 (3.55%)
Frequency of EVD insertion 1 41 (78.85%) 403 (80.28%) 1.225 0.094
  > 1 11 (21.15%) 99 (19.72%)