Calcar screws and adequate reduction reduced the risk of fixation failure in proximal humeral fractures treated with a locking plate: 190 patients followed for a mean of 3 years

Table 5 Multivariate Cox proportional hazards analyses with time to fixation failure as outcome

Covariate	n	Hazard ratio	95% CI	p value
Calcar screws
Yes	97	1 ^a
No	93	8.6	(1.9 to 39.3)	0.005
Adequate reduction > 120°
Yes	179	1 ^a
No (residual varus)	11	4.9	(1.3 to 17.9)	0.02

ISSN: 1749-799X