Table 3.

Study outcomes by treatment group

	Overall (n=1079)	Sliding hip screw (n=542)	Cancellous screws (n=537)	Hazard ratio (95% CI)	p value
Reoperation
Any reoperation	224 (21%)	107 (20%)	117 (22%)	0.83 (0.63–1.09)	0.18
Implant removal	74 (7%)	25 (5%)	49 (9%)	0.42 (0.25–0.70)	0.0009
Implant exchange: total hip arthroplasty	104 (10%)	64 (12%)	40 (7%)	1.51 (1.00–2.27)	0.0494
Implant exchange: hemiarthroplasty	55 (5%)	26 (5%)	29 (5%)	0.89 (0.52–1.51)	0.66
Implant exchange: internal	16 (1%)	2 (<1%)	14 (3%)	0.14 (0.03–0.62)	0.0024
Fixation
Implant exchange: spacer	3 (<1%)	1 (<1%)	2 (<1%)	0.50 (0.05–5.45)	0.56
Soft tissue procedure	6 (1%)	4 (1%)	2 (<1%)	1.98 (0.36–10.77)	0.42
Proximal femoral osteotomy	1 (<1%)	1 (<1%)	1 (<1%)	0.99 (0.06–15.80)	0.99
Avascular necrosis	78 (7%)	50 (9%)	28 (5%)	1.91 (1.06–3.44)	0.0319
Non-union	66 (6%)	33 (6%)	33 (6%)	0.92 (0.48–1.75)	0.80
Implant failure	87 (8%)	42 (8%)	45 (8%)	0.95 (0.61–1.48)	0.81
Infection
Any infection	19 (2%)	10 (2%)	9 (2%)	1.10 (0.45–2.69)	0.83
Superficial infection	8 (1%)	4 (1%)	4 (1%)	0.99 (0.25–3.94)	0.99
Deep infection	11 (1%)	6 (1%)	5 (1%)	1.19 (0.37–3.87)	0.77
Fracture healing*
Healed by month 24	532/795 (67%)	262/398 (66%)	270/397 (68%)	..	0.71
Not healed by month 24	3/795 (<1%)	2/398 (1%)	1/397 (<1%)	..
Not healed at time of last visit	260/795 (33%)	134/398 (34%)	126/397 (32%)	..
Fracture shortening >5 mm (n=532)†	146/532 (27%)	69/262 (26%)	77/270 (29%)	0.92 (0.70–1.22)	0.57
Mortality	156 (14%)	73 (13%)	83 (15%)	0.81 (0.58–1.12)	0.20

Data are n (%). Relative risk was calculated where the total number of events is less than 50.

^*795 patients were included in the fracture healing analysis. 284 patients did not have radiograph available for fracture healing adjudication, and therefore were not included in the denominator.

^†532 patients were included in the shortening analysis on the basis of the number of healed fractures with shortening data.