TABLE 2.

Treatment history of patients in the study.

Clinical Characteristics	Frequency	Percentage (%)
Number of surgical operations
None	165	71.7
1	49	21.3
> 1	16	7.0
Duration of broad spectrum antibiotic therapy
1–10 days	92	42.6
11–20 days	105	45.7
21–40 days	27	11.7
Invasive procedures
Intravenous cannulation	212	92.2
Nasogastric tube passage	143	62.2
Urinary catheterisation	118	51.8
Tracheostomy	20	13.6
Venous cutdown	7	8.7