Stratified analysis of physician ordering
| Mean physician orders per month | p Value | ||
|---|---|---|---|
| Preintervention | Intervention | ||
| Cost | |||
| <US$100 (n=9338) | 38 orders | 29 orders | <0.0001 |
| US$100–$300 (n=3080) | 13 orders | 9 orders | <0.0001 |
| Turn-around time | |||
| ≤5 days (n=6406) | 26 orders | 21 orders | <0.0001 |
| >5 days (n=6027) | 24 orders | 17 orders | <0.0001 |