Table 3.
Univariable and multivariable logistic regression analysis (OR (95% CI)) of candidate predictors of disagreement between ED adjudicated diagnosis and NACRS coding
| TIA NACRS main-position algorithm (N=122) |
TIA NACRS any-position algorithm (N=106) |
Cerebral ischaemia NACRS main-position algorithm (N=138) |
||||
| Univariable | Multivariable | Univariable | Multivariable | Univariable | Multivariable | |
| Age | 1.00 (0.98 to 1.01) | 1.00 (0.99 to 1.02) | 1.00 (0.98 to 1.01) | – | ||
| Male sex | 1.28 (0.84 to1.96) | – | 1.10 (0.70 to 1.71) | 1.08 (0.72 to 1.63) | – | |
| ABCD2 ≥4 | 1.07 (0.66 to 1.74) | – | 0.94 (0.57 to 1.54) | – | 0.97 (0.61 to 1.53) | – |
| Ongoing symptoms in ED | 0.36 (0.23 to 0.55) | 0.32 (0.20 to 0.51) | 0.65 (0.42 to 1.02) | – | 0.91 (0.60 to 1.38) | – |
| Vascular risk factors | – | – | – | |||
| 0 | Ref | Ref | Ref | |||
| 1 | 0.71 (0.39 to 1.32) | 0.62 (0.33 to 1.17) | 0.63 (0.35 to 1.13) | |||
| ≥2 | 0.90 (0.55 to 1.48) | 0.71 (0.42 to 1.17) | 0.68 (0.42 to 1.10) | |||
| Neurovascular imaging in ED | 0.76 (0.31 to 1.85) | – | 0.62 (0.26 to 1.51) | – | 0.63 (0.27 to 1.46) | – |
| Abnormal neurovascular imaging | 0.99 (0.63 to 1.55) | – | 0.94 (0.58 to 1.51) | – | 0.94 (0.60 to 1.45) | – |
| Neurology consult | 0.57 (0.34 to 0.95) | 0.77 (0.44 to 1.35) | 1.03 (0.58 to 1.82) | – | 0.62 (0.37 to 1.03) | – |
| Weekend | 0.90 (0.52 to 1.55) | – | 0.62 (0.34 to 1.15) | – | 0.67 (0.39 to 1.16) | – |
| Night shift | 1.01 (0.66 to 1.54) | – | 1.33 (0.86 to 2.08) | – | 1.18 (0.78 to 1.77) | – |
| Documented diagnostic uncertainty | 3.08 (1.86 to 5.13) | 3.71 (2.16 to 6.36) | 2.49 (1.48 to 4.19) | 3.16 (1.82 to 5.47) | 2.59 (1.57 to 4.28) | 3.26 (1.93 to 5.50) |
| Failure to document a diagnosis | 1.14 (0.66 to 1.97) | – | 1.83 (1.06 to 3.13) | 2.51 (1.42 to 4.45) | 1.88 (1.12 to 3.14) | 2.55 (1.49 to 4.37) |
Bold indicates p<0.05.
ED, emergency department; NACRS, National Ambulatory Care Reporting System; TIA, transient ischaemic attack.