TSH and BNP ordering by group, overall and by training level
| No. (% (95% CI for %*)) of participants | |||
| Intervention | Control | p Value† | |
| All participants, no. | 74 | 68 | |
| Ordered TSH | 29 (39 (28 to 51)) | 0 (0 (0 to 5)) | <0.001 |
| Ordered BNP | 25 (34 (23 to 46)) | 0 (0 (0 to 5)) | <0.001 |
| By training level‡ | |||
| Staff, no. | 8 | 7 | |
| Ordered TSH | 4 (50 (16 to 84)) | 0 (0 (0 to 42)) | 0.08§ |
| Ordered BNP | 4 (50 (16 to 84)) | 0 (0 (0 to 42)) | 0.08§ |
| Senior resident, no. | 7 | 10 | |
| Ordered TSH | 4 (57 (18 to 90)) | 0 (0 (0 to 31)) | 0.01§ |
| Ordered BNP | 0 (0 (0 to 42)) | 0 (0 (0 to 31)) | NA |
| Junior resident, no. | 8 | 6 | |
| Ordered TSH | 5 (63 (24 to 91)) | 0 (0 (0 to 5)) | 0.03§ |
| Ordered BNP | 3 (38 (9 to 76)) | 0 (0 (0 to 46)) | 0.21§ |
| Clinical clerk, no. | 51 | 45 | |
| Ordered TSH | 16 (31 (19 to 46)) | 0 (0 (0 to 8)) | <0.001 |
| Ordered BNP | 18 (35 (22 to 50)) | 0 (0 (0 to 8)) | <0.001 |
*Clopper-Pearson exact CIs.
†χ2 test unless otherwise indicated.
‡Senior resident=post graduate years 3 to 6, junior resident=post graduate years 1 or 2, clinical clerk=medical student years 3 or 4.
§Fisher’s exact test due to small expected cell sizes.
BNP=brain natriuretic peptide; NA, not applicable as test not ordered in either group; TSH, thyroid stimulating hormone.