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. Author manuscript; available in PMC: 2019 Mar 19.
Published in final edited form as: Neurocrit Care. 2017 Feb;26(1):58–63. doi: 10.1007/s12028-016-0285-3

Table 3 –

Daily microbiological culture acquisition and results

Microbiology cultures Day 1
(n = 697)		 Day 2
(n = 591)		 Cumulative
(n = 697)		 Estimated direct
costs
Blood
 Patients tested 125 (18) 131(22) 233 (33) Total:
 Total cultures obtained 214 218 432 $22,200
 True positive 1 (0.1) 0 (0) 1 (0.1) Per true positive:
 False positive (contaminant) 6 (1) 5 (0) 11 (2) $22,200
Urine
 Patients tested 154 (22) 134(23) 261 (37) Total:
 Total cultures obtained 160 137 297 $18,750
 True positive 21 (3) 15 (2) 36 (5) Per true positive:
 False positive (contaminant) 22 (3) 20 (3) 42 (6) $521
Sputum
 Patients tested 100 (14) 146(25) 227 (33) Total:
 Total cultures obtained 101 148 249 $23,000
 True positive 43 (6) 52 (7) 92 (13) Per true positive:
 False positive (contaminant) 44 (6) 76 (11) 119 (17) $250

Data are presented number with corresponding percentage.