Table 3 Comparison on the EVD use between two groups
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%) | ||