. Author manuscript; available in PMC: 2014 Jun 1.

Published in final edited form as: J Safety Res. 2012 Dec 11;45:133–139. doi: 10.1016/j.jsr.2012.11.001

Table 4.

Cost ratio comparisons by TBI type for WRTBI reported in WTR and linked to a closed, compensable State Fund WC claim (N=151).

	Medical costs^a		Time-loss compensation^b

	Unadjusted CR (95% CI)	Adjusted CR (95% CI)	Unadjusted CR (95% CI)	Adjusted CR (95% CI)
TBI with other trauma	1.00 (Ref)	1.00 (Ref)	1.00 (Ref)	1.00 (Ref)
Isolated TBI	1.20 (0.30, 4.73)	0.44 (0.29, 0.68)	0.42 (0.22, 0.82)	0.29 (0.17, 0.51)

Adjusted, multivariable models include the following covariates: age, sex, year of injury, and maximum AIS for head/neck.

Abbreviations: CI, confidence interval; CR, cost ratio; TBI, traumatic brain injury; WC, workers’ compensation; WRTBI, work-related traumatic brain injury; WTR, Washington Trauma Registry.

Cost ratios compare TBI with other trauma to isolated TBI.

Medical costs refer to total paid-to-date professional, facility, and pharmacy costs from closed claims. Medical costs are inflation adjusted to December 2008 equivalents using the Medical Consumer Price Index (CPI), based on the month and year of injury.

Time-loss compensation costs refer to total paid-to-date compensation for time lost from work due to injury and are inflation adjusted to December 2008 equivalents using the CPI, based on the month and year of injury.