Table 1.

Computerized provider order entry compared with laboratory results for all CT angiography orders in the emergency department, 1 January to 31 December 2011

	Laboratory d-dimer			Total
	High	Normal	Not performed
Clinician entered d-dimer
Elevated	346 (26.7%)	2* (0.2%)	13* (1.0%)	361 (27.9%)
Normal	0	11 (0.8%)	6 (0.5%)	17 (1.3%)
Not ordered	60 (4.6%)	40* (3.1%)	818 (63.1%)	918 (70.8%)
Total	406 (31.3%)	53 (4.1%)	837 (64.6%)	1296

Cells with accurate clinician data entry are in italics.

Cells with errors in clinician data entry are shaded.

*Cases of potential ‘gaming’.