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Table 1 Comparison of patients variables between the Sliding group and Non-sliding group

From: Is the lag screw sliding effective in the intramedullary nailing in A1 and A2 AO-OTA intertrochanteric fractures? A prospective study of Sliding and None-sliding lag screw in Gamma-III nail

Variables Sliding group Non-sliding group P values
Patients(n) 40 40  
Age(y) 45.55 ± 9.87 46.83 ± 8.76 0.453
Gender (Male/Female) 24/16 30/10 0.232
Side (Left/Right) 15/25 19/21 0.498
Weight 1M postoperatively (kg) 64.83 ± 8.79 65.93 ± 8.68 0.575
AO classification    
 Group A (31-A1) 7 4  
 Group B (31-A2.1) 12 16 0.493
 Group C (31-A2.2, A2.3) 21 20  
Operation time (min) 46.73 ± 10.37 48.35 ± 9.23 0.461
Intra-operative blood loss (ml) 141.1 ± 18.12 138.5 ± 19.42 0.538
Tip-Apex Distance (mm) 22.03 ± 4.19 21.23 ± 3.12 0.336
Fracture reduction (mm) 8.48 ± 3.34 8.98 ± 3.50 0.515
Length of hospital stay (days) 4 ± 1 4 ± 1 NA
Bone healing cases (postoperatively) 40 40  
 3M 34(85.00%) 36(90.00%)  
 6M 39(97.50%) 38(95.00%) NA
 12M 40(100%) 39(97.50%)  
Complications    
 Group A (31-A1) 0 0  
 Group B (31-A2.1) 0 2 (Femoral shaft fracture) NA
 Group C (31-A2.2, A2.3) 0 1 (Cut-out)  
Average healing time (Months)    
 Group A (31-A1) 3.00 ± 1.13 3.00 ± 0.00 1
 Group B (31-A2.1) 3.25 ± 0.87 3.25 ± 0.87  
 Group C (31-A2.2, A2.3) 3.23 ± 0.81 3.85 ± 3.64  
Harris Hip Score    
 Group A (31-A1) 88.00 ± 8.10 90.25 ± 5.12 0.927
 Group B (31-A2.1) 86.33 ± 11.85 87.13 ± 6.60  
 Group C (31-A2.2, A2.3) 84.52 ± 5.51 85.60 ± 10.34