Comparing the costs and outcomes of an integrated twin compression screw (ITCS) nail with standard of care using a single lag screw or a single helical blade cephalomedullary nail in patients with intertrochanteric hip fractures

Table 1 Clinical parameters used in the economic model

Outcome	Mean	N	Events	No events	Source
Implant failures	0.159	762	121	641	Updated Nherera 2018 [13]
Revisions	0.071	637	45	592
Non-unions	0.022	447	10	437
Outcome	Mean	Lower 95 CI	Upper 95% CI	SE	Source
Mortality due to fractures	0.06	0.03	0.12	0.02	Swart 2014 [12]
Revision surgery mortality	0.06	0.0001	0.09	0.02	Swart 2014 [12]
Health-related quality of life (utility data)
Utility for healed fracture	0.700	0.630	0.800	0.044	Swart 2014 [12]
Utility for revision	0.600	0.450	0.750	0.080	Swart 2014 [12]
Effectiveness of integrated compression screw
Implant-related failures	0.15	0.09	0.24	0.25	Updated Nherera 2018 [13]
Revisions	0.31	0.17	0.56	0.30
Non-unions	0.54	0.17	1.66	0.58
Proportion of patients in nursing home
Nursing home	0.24	0.18	0.3	0.03	Gu 2016 [1]

The lower and upper values for revision utility and proportion of patients in nursing home were assumed to be 25% below and above the reported mean values
Abbreviations: CI confidence interval, SE standard error, N total number of patients for the outcome

ISSN: 1749-799X