Table 4.

Percentage of clinical prescribing errors that were technology-related immediately, 1-year post, and 4-years post-CPOE by potential harm rating.

Potential harm rating of error	Immediately post			1-year post			4-years post
	No. of prescribing errors	No. of TREs	% of errors that were TREs	No. of errors	No. of TREs	% of errors that were TREs	No. of errors	No. of TREs	% of errors that were TREs
Moderate	620	151	24.4	266	62	23.3	244	96	39.3
Major	110	69	62.7	28	12	42.9	26	21	80.8
Serious	14	13	92.9	5	3	60.0	2	1	50.0
Total	744	233	31.3	299	77	25.8	272	118	43.4

Abbreviations: CI = confidence interval; CPOE = computerized provider order entry; TRE = technology-related error.