The effect of pre-existing health conditions on the cost of recovery from road traffic injury: insights from data linkage of medicare and compensable injury claims in Victoria, Australia

Table 3 The pre-injury service and items which have significant impact on the medical costs of recovery after road traffic injury (in Australian Dollars)

Variable	Coefficient^c
Outcome Variable: Post-injury Medical Cost^a
Cardiovascular diagnostics and investigation (MBS Sub Group D1-6)	$76.44 [$54.27,$98.62]
Initiation of management of anaesthesia (MBS Sub Group T10-6)	$257.65 [$174.16,$341.16]
Thyroid function tests (MBS Item 66719)	$356.28 [$258.79, $453.78]
Prothrombin time test (MBS Item 65120)	$26.77 [$15.02, $38.53]
Vascular Ultrasound (MBS Sub Group I1-3)	$359.79 [$273.77, $445.82]
Radiographic examination of head (MBS Sub Group I3-3)	$301.92 [$186.58, $417.28]
Drug for Anti-inflammatory and Anti-rheumatic Products (ATC Code M01)	$49.75 [$35.4, $64.12]
Drugs for Sensory Organs (ATC Code S01)	$31.48 [$23.04, $39.93]
Outcome Variable: Post-injury Medical Cost, Logged^b
Drugs used in diabetes (ATC Code A10)	0.08 [0.05, 0.11]

^aThe coefficient indicates the average change in the category cost for every extra item used from the services listed based on a linear model. ^bThe coefficient indicates the average percentage change in the category cost for every extra item used from the services listed based on a nonlinear model. ^c[95 % confidence interval]

ISSN: 1472-6963