Table 1.
Definition of Study Periods for Pre-implementation and Post-implementation.a
| EHR go-live date | Year/calendar quarter | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2015 | 2016 | 2017 | 2018 | 2019 | ||||||||||||||
| Q1 | Q2 | Q3 | Q4 | Q1 | Q2 | Q3 | Q4 | Q1 | Q2 | Q3 | Q4 | Q1 | Q2 | Q3 | Q4 | Q1 | Q2 | |
| July 2017 (1 hospital) | Pre-implementation | A | B | C | D | |||||||||||||
| December2017 (4 hospitals) | Pre-implementation | A | B | C | D | |||||||||||||
| February 2018 (3 hospitals) | Pre-implementation | A | B | C | D | |||||||||||||
| June 2018 (2 hospitals) | Pre-implementation | A | B | C | D | |||||||||||||
Abbreviation: EHR, electronic health record.
a Patients were assigned to the study periods based on discharge date. A: Transition quarter corresponds to the calendar quarter of EHR go-live date; B: First quarter post-implementation; C: Second quarter post-implementation; D: Third quarter post-implementation.