Comparison of mean number of test per month in preintervention and postintervention periods
| Test | Mean (95% CI) tests per month | |
| Preintervention* | Postintervention† | |
| ESR | 667 636 to 697) | 447 (418 to 476) |
| CRP | 684 (652 to 715) | 710 (680 to 739) |
| Concurrent ESR and CRP | 504 (483 to 525) | 378 (358 to 398) |
| CBC‡ | 13 726 (13 359 to 14 093) | 14 441 (14 098 to 14 785) |
*Preintervention period was from 1 September 2016 to 31 October 2017.
†Postintervention period was from 1 November 2017 to 28 February 2019.
‡CBC served as control.
CBC, complete blood count; CRP, C reactive protein; ESR, erythrocyte sedimentation rate.