Nonanatomical Reduction of Femoral Neck Fractures in Young Patients (≤65 Years Old) with Internal Fixation Using Three Parallel Cannulated Screws

Table 4

Univariate analysis of risk for complications and reoperations.

Variables	Without complications ()	With complications ()		Without reoperations ()	With reoperations ()
Age			1.000^1			0.824^1
Sex			0.101^2			0.265^2
Female	34 (30.9%)	14 (12.7%)		38 (34.5%)	10 (9.1%)
Male	52 (47.3%)	10 (9.1%)		54 (49.1%)	8 (7.3%)
Side			0.356^2			0.303^2
Right	41 (37.3%)	14 (12.7%)		44 (40.0%)	11 (10.0%)
Left	45 (40.9%)	10 (9.1%)		48 (43.6%)	7 (6.4%)
Garden classification			0.046^2			0.067^2
I, II	24 (21.8%)	2 (1.8%)		25 (22.7%)	1 (0.9%)
III, IV	62 (56.4%)	22 (20.0%)		67 (60.9%)	17 (15.5%)
Pauwels classification			0.130^2			0.122^3
I	23 (20.9%)	2 (1.8%)		24 (21.8%)	1 (0.9%)
II	42 (38.2%)	13 (11.8%)		45 (40.9%)	10 (9.1%)
III	21 (19.1%)	9 (8.2%)		23 (20.9%)	7 (6.4%)
Fracture level			0.820^3			1.000^3
Subcapital	48 (43.6%)	15 (13.6%)		52 (47.3%)	11 (10.0%)
Midcapital	31 (28.2%)	8 (7.3%)		33 (30.0%)	6 (5.5%)
Basicervical	7 (6.4%)	1 (0.9%)		7 (6.4%)	1 (0.9%)
Reduction classification			0.020^2			0.043^2
Anatomic reduction	35 (31.8%)	6 (5.5%)		36 (32.7%)	5 (4.5%)
Positive buttress position reduction	30 (27.3%)	5 (4.5%)		24 (21.8%)	10 (9.1%)
Negative buttress position reduction	21 (19.1%)	13 (11.8%)		32 (29.1%)	3 (2.7%)
Garden alignment index angles
AP			0.316^1			0.796^1
Lateral			0.137^1			0.523^1
CTI (every 0.1)			0.026^2			0.046^2
0.4-0.5	14 (12.7%)	9 (8.2%)		16 (14.5%)	7 (6.4%)
0.5-0.6	47 (42.7%)	13 (11.8%)		50 (45.5%)	10 (9.1%)
0.6-0.7	25 (22.7%)	2 (1.8%)		26 (23.6%)	1 (0.9%)
TCD			0.954^2			0.774^2
<5 mm	64 (58.2%)	18 (16.4%)		69 (62.7%)	13 (11.8%)
≥5 mm	22 (20.0%)	6 (5.5%)		23 (20.9%)	5 (4.5%)
Angle of inferior screw			0.005^3			0.013^3
<125°	5 (4.5%)	2 (1.8%)		3 (2.7%)	4 (3.6%)
≥125°	84 (76.4%)	19 (17.3%)		89 (80.9%)	14 (12.7%)

AP: anterior-posterior; CTI: cortical thickness index; TCD: tip-caput distance. ¹Mann-Whitney -test; ²chi-square test; ³Fisher’s exact test.