TABLE A-8 NHTSA Estimates of Annual Quantified Benefits

Type of Anchor

Endpoint

Avoided Incidence (cases/year)

Equivalent Fatalities (undiscounted)

Options permitted in final rule:

Rigid restraint attachment/Rigid vehicle anchor

Lives saved

36–47

36–47

Injuries prevented

1,231–2,893

21–50

Total

N/A

57–97

Nonrigid restraint attachment/Rigid vehicle anchor

Lives saved

36–50

36–50

Injuries prevented

1,235–2,929

21–50

Total

N/A

57–101

Option not permitted in final rule:

Nonrigid restraint attachment/Nonrigid vehicle anchor

Lives saved

36–50

36–50

Injuries prevented

1,235–2,929

21–50

Total

N/A

57–101

NOTE: Detail does not add to total due to rounding.

SOURCE: NHTSA (1999a), p. i, Table S-1, p. 49, Table 17.

using generic HRQL indexes. Based on advice from NHTSA staff, we relied on data from the agency’s National Automotive Sampling System, Crashworthiness Data System (NASS-CDS) for the years 1999–2003. While this system includes data on thousands of crash victims, only 22 of the sampled cases involved injuries to children in child restraints. These sample cases represent roughly 1,752 cases nationwide (including 160 that are immediately fatal); however, NHTSA staff caution that the standard error associated with extrapolating from this small number of sample cases is quite large. As a result, we did not adjust our estimates for comparability with the estimates of cases averted for the different injury classes in the NHTSA child restraints analysis. (The regulation was not expected to prevent all injuries to restrained children, even after all vehicles and restraints in use are equipped with the anchors.)

The injuries reported for these 22 cases are provided in Table A-9 below. For each case, the table indicates the sample weight, or multiplier, that is applied to the sample values to extrapolate to the national population. In addition, the exhibit indicates the status of the child immediately after the accident and lists the individual injuries incurred. The final column reports the AIS classification for the case; the MAIS for cases with multiple injuries is marked with an asterisk (*).17

17  

Cases with injuries in AIS categories 0 or 1 only were excluded from this analysis because they are not expected to noticeably impact HRQL.



The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement