Error Type MP EP1 EP2 P Value Name of drug 2 1 3 ns Dosage form 2 1 2 ns Route of administration 38 2 0 p<0,001 Dose 156 4 2 p<0,001 Units of measurement 295 1 1 p<0,001 Timing: hour and frequency of administration 27 20 8 p<0,001 Medication order 14 18 10 ns

Table 2: Medication errors over three study periods according to type MP: phase 1 (manual prescription), prior to electronic prescription implementation EP1: phase 2 (electronic prescription), one month after electronic prescription implementation PE2: phase 3 (electronic prescription), two months after electronic prescription implementation ns: not statistically significant.