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Table 1: Distribution of DRGs
Intraspinal^* Foraminal Extraforaminal Total
L1 
    Female 0 (0) 121 (99.2) 1 (0.8) 122
    Male 0 (0) 108 (100) 0 (0) 108
    Combined 0 (0) 229 (99.6) 1 (0.4) 230
L2 
    Female 0 (0) 121 (99.2) 1 (0.8) 122
    Male 0 (0) 107 (99.1) 1 (0.9) 108
    Combined 0 (0) 228 (99.1) 2 (0.9) 230
L3 
    Female 0 (0) 120 (98.4) 2 (1.6) 122
    Male 0 (0) 105 (97.2) 3 (2.8) 108
    Combined 0 (0) 225 (97.8) 5 (2.2) 230
L4 
    Female 0 (0) 122 (100) 0 (0) 122
    Male 0 (0) 108 (100) 0 (0) 108
    Combined 0 (0) 230 (100) 0 (0) 230
L5 
    Female 9 (7.4)^† 113 (92.6) 0 (0) 122
    Male 4 (3.7)^† 104 (96.3) 0 (0) 108
    Combined 13 (5.7) 217 (94.3) 0 230
Total 13 1129 8 1150
Note:—Data in parentheses are percentages calculated on the basis of the total of each sex. DRG indicates dorsal root ganglion.
* There was statistically significant difference in the distribution of DRG position among the different levels (χ² = 53.687, P < .0001).
† At level L5, there was no statistical difference in the incidence of intraspinal ganglia of DRG between women and men (Fisher exact test, P = .265).