Spearman rank correlation coefficient at three time intervals
| BPV index | Mean±SD | Spearman rho | P value for comparison with ordinal mRS |
| 0–24 hours (n=182, vital sign readings=5870) | |||
| SBP Mean | 134.2±19.1 | 0.24 | 0.001 |
| DBP Mean | 73.1±11.6 | 0.02 | 0.821 |
| SBP SD | 14.9±6.4 | 0.28 | <0.001 |
| DBP SD | 11.6±3.9 | 0.16 | 0.021 |
| SBP CV | 11.2±4.4 | 0.25 | <0.001 |
| DBP CV | 16.2±5.5 | 0.14 | 0.030 |
| SBP SV | 15.6±6.5 | 0.31 | <0.001 |
| DBP SV | 13.1±4.9 | 0.11 | 0.122 |
| 0–72 hours (n=163, vital sign readings=9172) | |||
| SBP Mean | 131.3±17.2 | 0.24 | 0.002 |
| DBP Mean | 70.4±10.7 | 0.03 | 0.863 |
| SBP SD | 15.8±6.0 | 0.32 | <0.001 |
| DBP SD | 12.0±3.5 | 0.17 | 0.054 |
| SBP CV | 12.0±4.3 | 0.25 | 0.001 |
| DBP CV | 17.3±5.2 | 0.16 | 0.056 |
| SBP SV | 15.0±5.4 | 0.31 | <0.001 |
| DBP SV | 12.3±4.0 | 0.11 | 0.179 |
| 0–120 hours (n=152, vital sign readings=11 312) | |||
| SBP Mean | 130.3±16.6 | 0.24 | 0.003 |
| DBP Mean | 69.4±10.4 | 0.03 | 0.915 |
| SBP SD | 15.7±5.2 | 0.33 | <0.001 |
| DBP SD | 11.9±3.1 | 0.16 | 0.086 |
| SBP CV | 12.0±3.6 | 0.26 | 0.001 |
| DBP CV | 17.5±5.0 | 0.15 | 0.078 |
| SBP SV | 14.7±4.5 | 0.30 | <0.001 |
| DBP SV | 12.1±3.5 | 0.06 | 0.060 |
BPV, blood pressure variability; CV, coefficient of variation; DBP, diastolic blood pressure; mRS, modified Rankin Scale; SBP, systolic blood pressure; SD, standard deviation; SV, successive variation.