Overall patient factors
| Ballistic femoral neck fractures | Closed Blunt-Injury femoral neck fractures | P value | |
| N=14 | N=29 | ||
| Age (years) | 26 (23 to 29) | 36 (25 to 42) | 0.078 |
| Gender (female) | 2 (14%) | 6 (21%) | 0.613 |
| BMI | 22.4 (19.4 to 25.1) | 23.7 (20.8 to 26.5) | 0.476 |
| Active tobacco use | 7 (58%) | 7 (24%) | 0.090 |
| Diabetes | 0 (0%) | 2 (7%) | 0.314 |
| Length of hospital stay (days) | 7 (4 to 12) | 6 (4 to 10) | 0.907 |
| Follow-up (months) | 6 (2 to 21) | 12 (6 to 21) | 0.364 |
| Minimum 1-year follow-up | 6 (43%) | 15 (52%) | 0.586 |
| Minimum 1-year follow-up or met failure criteria* | 7 (50%) | 16 (55%) | 0.750 |
Values are represented as median (IQR) or as the number of patients (percentage of the group) where appropriate. P values are from the Wilcoxon rank-sum test or χ2 test.
*Failure criteria include non-union, avascular necrosis, conversion to total hip arthroplasty, or conversion to Girdlestone procedure.
BMI, body mass index.