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Demographic and Clinical Variance and Operation Type
Values are mean ± SD. Group AM: were performed spinal anesthesia at 8 am to 12:00. Group Noon: were performed spinal anesthesia at 12:00 to 4:00 pm. Group PM: were performed spinal anesthesia at 4:00 to 8:00 pm. *P < 0.05 compared with other two groups.
