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Table 1 Comparison of general data and screw placement results between the guide template group and the free-hand group

From: Comparison of the 3D-printed operation guide template technique and the free-hand technique for S2-alar-iliac screw placement

Group Number of cases Sex Age (years) Number of screws Screw placement duration Screw placement results (%)
Male Female Excellent rate Good rate Acceptable rate Unacceptable rate
Guide template group 21 6 15 56.9 ± 8.4 42 151.6 ± 44.8 95.2 (40/42) 100 (42/42) 100 (42/42) 0 (0/42)
Free-hand group 26 9 17 58.6 ± 8.1 52 138.3 ± 45.9 80.8 (42/52) 94.2 (49/52) 100 (52/52) 0 (0/52)
Statistic value 0.195 − 0.706 1.411 4.368
P value 0.659 0.484 0.162 0.037 0.251