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1. Question a of question 1
Please use "Table 1" (fields: serial number of the first imaging examination after admission, time interval from onset to first imaging examination) and "Table 2" (fields: serial numbers at each time point and corresponding HM_volume) to determine after the onset of patients sub001 to sub100 Whether a hematoma expansion event occurred within 48 hours.
Result filling specifications: 1 yes, 0 no, filling position: field C of "Table 4" (whether hematoma expansion occurs). If a hematoma expansion event occurs, please also record the time when the hematoma expansion occurs.
Result filling specifications: For example, 10.33 hours, filling position: "Table 4" field D (hematoma expansion time).
Whether hematoma expansion occurs can be based on the changes in hematoma volume, which is specifically defined as: an absolute volume increase of ≥6 mL or a relative volume increase of ≥33% in subsequent examinations compared with the first examination.
Note: You can query the corresponding imaging examination time point through the serial number to "Appendix 1 - Search Form - Serial Number vs Time", and combine the time interval from onset to the first imaging and the subsequent imaging examination time interval to determine whether the current imaging examination is during the onset of illness 48 within hours.
2. Analysis of the model for question 1a
The first question of Question 1 requires us to judge the health status of 100 patients (sub001 to sub100) within 48 hours after onset based on the data in the three tables (Table 1, Table 2 and Appendix Table 1) in the data given in the question. Whether hematoma expansion event occurred&#x