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Table 2 Comparison between spinal anesthesia techniques between two groups of study

From: Comparison of post-spinal back pain after midline versus paramedian approaches for urologic surgeries

Variables Median, n = 76 Paramedian, n = 63 P value
Try    
 One 56 (73.7%) 35 (55.6%) 0.025
 Two 20 (26.3%) 28 (44.4%)  
Injection site    
 L3–L4 41 (53.9%) 25 (39.7%) 0.094
 L4–L5 35 (46.1%) 38 (60.3%)  
Parestesia 1 (1.3%) 2 (3.2%) 0.590
CSF    
 Clear 75 (98.7%) 63 (100.0%) (> 0.999)
 Bloody 1 (1.3%) 0 (0.0%)