Table 3 Neuroimaging by modality between time periods and secondary outcomes comparing time periods
Variable | Control period (N = 1052) n (%) | rMRI period (N = 1308) n (%) | Difference in percent (95% CI) | P |
|---|---|---|---|---|
rMRI | 114 (10.8) | 504 (38.5) | 27.7 (24.4, 31.0) | < 0.01 |
Head CT | 736 (70.0) | 634 (48.5) | −21.5 (−25.5, −17.5) | < 0.01 |
Full MRI | 202 (19.2) | 170 (13.0) | −6.2 (−9.3, −3.1) | < 0.01 |
Time to neuroimaging in minutes; median (IQR) | 119 (64–193) | 139 (84–208) | – | < 0.01 |
Total ED LOS in minutes; median (IQR) | 304 (231–387) | 304 (232–397) | – | 0.82 |
Any follow-up neuroimaging within 14 days, n (%) | 130 (12.4) | 169 (12.9) | 0.6 (−2.2, 3.3) | 0.72 |
Full MRI within 14 days, n (%) | 91 (8.7) | 130 (10.0) | 1.3 (−1.1, 3.7) | 0.36 |
Time to follow up neuroimaging, n (%) | 0.96 | |||
1–2 days | 100 (76.9) | 128 (75.7) | −1.2 (−11.6, 9.2) | |
3–7 days | 16 (12.3) | 21 (12.4) | 0.1 (−7.5, 7.8) | |
8–14 days | 14 (10.8) | 20 (11.8) | 1.1 (−6.8, 9.0) |