Audit 1 | Audit 2 | p Value | ||||||
Date | July–December 2004 | March–May 2006 | ||||||
Method | Random sample VQ scan requests | Consecutive sample VQ scan requests | ||||||
N | 119 | 171 | ||||||
Variable | ||||||||
PTP calculable | 56 | 47.6 (38.3 to 56) | 116 | 67.8 (60.5 to 74.4) | 0.0004 | |||
D-dimer test done | 101 | 84.9 (77.3 to 90.3) | 127 | 74.3 (67.2 to 80.3) | 0.04 | |||
D-dimer test use appropriate | 32* | 31.1 (22.9 to 40.6) | 62† | 41.3 (33.8 to 49.3) | 0.11 | |||
VQ scan standard reporting | 0 | 0 (0 to 4) | 171 | 100 (97.4 to 100) | <0.0001 | |||
Completed pathway | 56 | 47.6 (38.3 to 56) | 78 | 45.6 (38.3 to 53.1) | 0.8 |
Values are n and % (95% CI).
*Denominator = 103 (includes D-dimer test not done appropriately or inappropriately according to pathway).
†Denominator = 150 (includes D-dimer test not done appropriately or inappropriately according to pathway).