Appendix V - Summaries Of and Data From Articles On Deaths and Injuries From Vehicles Backing Up

    A review of research articles dealing directly with or indirectly touching on the issue of persons injured or killed as a result of being struck by a vehicle backing up identified several distinct trends relating to backing incidents. Backing incidents tend to:

  • Occur in residential driveways and parking lots,
  • Involve sport utility vehicles (SUVs) or small trucks,
  • Occur when a parent, relative or someone known to the family is driving, and
  • Particularly affect children less than five years old.

Brison RJ, Wicklund K, Mueller BA. Fatal pedestrian injuries to young children: a different pattern of injury. Am J Public Health 1988 Jul;78(7):793-5.
    This research examined Washington State death certificates from 1979-83 with ICD 9 E-Codes 814-825 (motor vehicle-related incidents) indicated as the cause of death. This study also reviewed coroners’ reports when needed and if such a report was available as well as police reports if necessary to obtain details of the incidents involved.
    The study identified 71 fatal motor vehicle injuries to children less than five years of age during the five-year study period. Of these, 41 were found to be non-traffic related, with 30 incidents occurring in driveways and 11 having occurred in apartment or store parking lots.
    The projected average annual death rate data presented in this study show that all of the non-traffic deaths involved children between the ages of 1 and 4. That data appear in the following chart:

Table XXII: (from Brison, et. al.) Average Annual Death Rates by Age and Sex of Child for Non-Traffic and Traffic-Related Pedestrian Incidents

 

Non-traffic

Traffic

Age (years)

Number

Rate/100,000 population

Number

Rate/100,000 population

0

0

--

2

0.6

1

19

5.8

7

2.2

2

11

3.4

4

1.2

3

7

2.2

10

3.1

4

4

1.2

7

2.2

1-4

41

3.2

28

2.2

Male

25

3.8

16

2.4

Female

16

2.5

14

2.2

    The propensity for SUVs or small trucks to be involved in non-traffic incidents as well as for a parent or family member to be driving is demonstrated in the following data that was presented in this study.

Table XXIII: (from Brison, et. al.) Characteristics of Non-Traffic and Traffic-Related Pedestrian Vehicle Collisions to Children Less than Age Five

Characteristics

Non-traffic

Traffic

Vehicle Type

   

   Light Truck

16

1

   4 x 4 Truck or Jeep

6

0

   Van

6

3

   Passenger Auto

9

25

Vehicle Direction

   

   Forward

9

29

   Reverse

23

1

   Fell/Jump from vehicle

3

0

Driver

   

   Father

10

0

   Mother

4

0

   Other family or visiting    friend

6

0

   Other

8

27


Winn DG, Agran PF, Castillo DN. Pedestrian injuries to children younger than 5 years of age. Pediatrics 1991 Oct;88(4):776-82.
    Similar results were found in this study that examined the differences in pedestrian injuries between toddlers (children two years old and younger) and preschoolers (children three and four years old). The study found that toddlers more often die in non-traffic accidents than do preschoolers and it confirmed that children aged one to four are the ones most affected by driveway incidents. “In the entire sample of child pedestrians 0 through 14 years of age, all of the hospital admissions for driveway related events involved children younger than 5 years of age and all of the fatalities were younger than 2 years of age,” the study reported.
    This study was based on data derived from a hospital-based monitoring system of motor vehicle-related injuries to children in Orange County, CA over a two-year period (April 1987 through March 1989). The monitoring system includes 9 of 38 hospitals in the county as well as the coroner’s office. The sample examined in this study included 67 toddlers and 102 preschoolers either injured or killed in non-traffic events. Backing was the vehicle action most common among incidents involving toddlers, accounting for 32 or 57 percent of the incidents reviewed. In incidents involving preschoolers, on the other hand, backing was the vehicle action in only 13 or 17 percent of the cases. The data relating to this issue appear below.

Table XXIV: (from Winn et. al.) Action of Vehicles Involved in Non-traffic Accidents Involving
Toddlers and Preschoolers

Characteristic

Toddlers (n=67)

Preschoolers (n=102)

Action of vehicle

No. (% of total)

No. (% of total)

Turning

2 (4)

6 (8)

Traveling Straight

22 (39)

57 (75)

Backing

32 (57)

13 (17)

Not ascertained

11

26


    The majority of the vehicles involved in the 169 non-traffic events included in this study were automobiles, 35 or 71 percent of the incidents involving toddlers and 52 or 74 percent of the incidents involving preschoolers.
    Of the 10 fatalities identified in the study, six involved toddlers and all of those involved a vehicle backing up. Four of these six incidents involved a van or pickup truck and five of the six incidents occurred in a driveway. All of the four deaths of preschoolers occurred mid-block and involved a vehicle (three cars, one motorcycle) proceeding straight.
    In addition to the 6 toddler and 4 preschooler deaths, the study identified 27 toddlers (40 percent) who required emergency department treatment only and 34 (51 percent) who were hospitalized. Some 44 (43 percent) of the preschoolers required emergency department treatment only and 54 (54 percent) required hospitalization.

Agran PF, Winn DG, Anderson CL. Differences in child pedestrian injury events by location. Pediatrics 1994 Feb;93(2):284-8.
    This research compared “child pedestrian injury events occurring in driveways and parking lots and at mid-block and intersections with respect to the characteristics and activity of the child, injury outcome measures, and characteristics of the vehicle and roadway.”
    Data for this study were derived from a large multi-hospital and coroner monitoring system for motor vehicle-related injuries to children in Orange County, CA. Data in the study cover the two-year period, April 1, 1987 through March 31, 1989. The sample consisted of 345 child pedestrians 0 to 14 years of age, who were injured during this period.
    With respect to non-traffic events, the study found:

  • 40 percent of the drivers involved in non-traffic events were driving vans, trucks, or four-wheel drive vehicles; most of these were backing up.
  • Most of the children struck were under five years of age.
  • Almost half were with adults at the time of the incident.
  • The majority of those injured in non-traffic events sustained minor head injuries, but 8 percent of those in driveways sustained non-survivable head injuries, which was a much higher percentage than those injured at other locations.

    Some of the data presented in the article and that supports these observations follow.

Table XXV: (from Agran et. al.) Location of Pedestrian Injury Events (N=345)

Location

N (%)

Midblock

182 (53)

Intersection

95 (28)

Driveway

39 (11)

Parking lot*

29 (8)

*The authors of the study found, “The results for events occurring in parking lots were similar to the driveway events.”

Table XXVI: (from Agran et. al.) Movement and Type of Vehicle That Struck Pedestrian by Location of Injury,
for Four Major Location Types

 

Driveway
(N=39) n(%)

Parking Lot (N=29) n(%)

Midblock (N=182) n(%)

Intersection (N=95) n(%)

Movement

       

Backing

28(78)

16(59)

6(3)

Forward

6(17)

10(37)

162(93)

61(72)

Turning

2(6)

1(4)

6(3)

24(28)

Unknown

3

2

8

10

Type of vehicle

       

Van, truck, pickup &
4-wheel drive

13(41)

11(39)

42(24)

17(19)

Passenger car

19(59)

17(61)

134(76)

71(81)

Unknown

7

1

6

7


Table XXVII: (from Agran et. al.) Gender and Age of Pedestrians by Location of Injury,
for Four Major Location Types

 

Driveway
(N=39) n(%)

Parking Lot (N=29) n(%)

Midblock (N=182) n(%)

Intersection (N=95) n(%)

Gender

       

Female

10(26)

7(24)

48(26)

40(42)

Male

29(74)

22(76)

134(74)

55(58)

Age in years

       

0-2

22(56)

7(24)

17(9)

0(0)

3-4

8(21)

9(31)

42(23)

8(8)

5-9

5(13)

4(14)

87(48)

34(36)

10-14

4(10)

9(31)

36(20)

53(56)

Table XXVIII: (from Agran et. al.) Companions by Location of Injury, for Four Major Types

 

Driveway
(N=39) n(%)

Parking Lot (N=29) n(%)

Midblock (N=182) n(%)

Intersection (N=95) n(%)

Companions

       

With adults

14(45)

14(50)

41(23)

21(24)

With other children

11(36)

13(46)

101(57)

43(49)

Alone

6(19)

1(4)

34(19)

23(26)

Unknown

8

1

6

8


Table XXIX: (from Agran et. al.) Disposition by Location of Injury for Four Major Location Types

 

Driveway
(N=39) n(%)

Parking Lot (N=29) n(%)

Midblock (N=182) n(%)

Intersection (N=95) n(%)

Fatality

4(10)

8(4)

4(4)

Admitted to hospital and discharged home

15(38)

11(38)

103(57)

50(53)

Treated in emergency department and released

20(51)

18(62)

71(39)

41(33)


Duhaime AC, Eppley M, Marguilies S, Heher KL, Bartlett SP. Crush injuries to the head in children. Neurosurgery 1995 Sept;37(3):401-6.
    While the focus of this article was on the clinical and treatment aspects of dealing with crush injuries to a child’s head, it was nonetheless interesting and noteworthy for this NHTSA research effort that of the seven cases chosen to be reported in this article, four involved a child’s head being run over by a motor vehicle backing up in a driveway or parking lot. Of these cases, three involved oversized vehicles --one van, one truck, and one small bus. One involved a car. The article does not indicate the years in which the cases occurred.

Partrick BA, Bensard DD, Moore EE, Partington MD, Karrer FM. Driveway crush injuries in young children: a highly lethal, devastating, and potentially preventable event. J Pediat Surg 1998 Nov;33(11):1712-5.
    This study was based on a six-year review (1991 to 1996) of child (less than 18 years of age) pedestrian injuries treated at two urban trauma centers. In the study sample of 527 children who as pedestrians were injured by automobiles, the authors found 51 (9.7%) incidents that were driveway-related and in which the car rolled backwards over the child. Children under five made up the majority of the driveway cases (41 of 51, 80%). Six driveway cases involved children between the ages of five and nine. Four cases involved children older than nine. Of the children who died as a result of a driveway incident, all were in the 0 to 4 age group.
    As with other studies discussed here, this study considered who was driving the vehicle in driveway incidents. A parent was the driver in at least 14 (34%) of the driveway rollover accidents. Siblings were the drivers in four cases (10%), a grandmother in one incident (2%), and neighbors in three (7%) incidents. The person driving the vehicle was not specified in 19 incidents.

Silen ML, Kokoska ER, Fendya DG, Kurkchubasche AG, Weber TR, Tracy TF. Rollover injuries in residential driveways: age-related patterns of injury. Pediatrics 1999 Jul;104(1):e7.
    This research addressed rollover injuries in driveways and age-related patterns involved. From the medical records of 3,971 consecutive admissions to a single urban trauma service between March 1990 and October 1994, the authors found 26 children (0.7%) who sustained rollover injuries caused by a motor vehicle in a residential driveway. Eighteen (69%) of these injures occurred as the result of the child being struck by an adult driver in a vehicle backing up. The other 8 incidents involved either a sibling under the age of 16 rolling over the child (n=4) or the child putting the vehicle in gear then attempting to get out of the vehicle (n=4). Two of the children died as a result of their injuries and were excluded from the remainder of the study. Nineteen of the 24 survivors in this study were less than 5 years old. The study also determined that younger children were more likely to sustain more severe injuries as a result of these incidents, particularly those less than two years old.

Nadler EP, Courcoulas AP, Gardner MJ, Ford HR. Driveway injuries in children: risk factors, morbidity, and mortality. Pediatrics 2001 Aug: 108(2):326-8.
    A study published in 2001 by Nadler et. al. focused on a cohort of 64 patients admitted to the Children’s Hospital of Pittsburgh after having sustained motor vehicle-related injuries in a driveway. This cohort was derived from a total of 9,820 patients admitted to the hospital’s trauma program between May 1986 and August 1999. The cohort was divided into two groups based on the types of events in which they were involved. Group 1 involved an adult driver striking a child because he or she was unaware of the child’s presence. Group 2 consisted of children who were injured by a vehicle set in motion by a child. More than 85 percent of the incidents included in Group 1 involved a vehicle going in reverse.
    The findings of this study are consistent with those previously discussed with respect to the age of the children most affected by backing incidents in driveways (less than 5 years old) and the types of vehicles involved (more often an SUV or truck). Data supporting this presented in the study appear below.

Table XXX: (from Nadler et. al.) Age Distribution of Children Injured in Driveway Related Accidents and
Types of Vehicles Involved

 

Total (n=64)

Group 1 (n=44)

Group 2 (n=20)

Age in yrs (mean)

  
 
 

<2

 

19 (43%)

3 (15%)

2-5

 

22 (50%)

9 (45%)

>5

 

3 (7%)

8 (40%)

Type of vehicle

 
 
 

SUV or truck

31

28

3

Car

26

16

10

Not available

7

0

7


Di Scala C, Sege R, Guohua L. Outcomes of Pediatric Pedestrian Injuries By Locations of Event. 45th Annual Proceedings, Association for the Advancement of Automotive Medicine, Sept. 24-26, 2001.
    This study by DiScala, et. al. focused on medical outcomes of pediatric pedestrian victims of motor vehicle accidents based on the location where the accident occurs. Data presented in this article relate entirely to the location of the incident. No data specific to backing incidents were presented. However, based on the review of the data involved, the following statement was made in the article with respect to incidents that occur in driveways, “Typically, a very young child is playing in the driveway, and is run over by a family member or a visiting friend reversing a vehicle out of a home driveway.”

Nonoccupant Fatalities Associated With Backing Crashes. Research Note, Revised February 1997, National Highway Traffic Safety Administration.
    The principal investigator involved in preparing this note retired from the agency several years ago. It was therefore not possible for the researchers involved in this report to clarify the methodology used in generating the data that are presented in this research note. The research note is based on 1992 and 1993 death certificate data from the National Center for Health Statistics (NCHS) and on traffic fatality data from police reports contained in NHTSA’s Fatality Analysis Reporting System (FARS). The research note reports that data from these two sources “were used to obtain average annual estimates of the number of fatalities associated with off-road and on-road fatal backing crashes.” The note makes clear, “Due to the lack of detailed information on death certificates (the source of NCHS data), it is not possible to determine the exact number of nonoccupants killed in off-road backing crashes. The NCHS data, therefore, provide an estimate of the maximum number of fatalities associated with these crashes.”
    Data presented in this research note confirm one of the patterns associated with backing fatalities that was identified in the research on which this report is based. The research note found that children ages 1-4 are particularly affected by backing crashes. The numbers presented in the note, however, are higher than were found either in counts made as part of the research done for this report or in projections of annual national totals based on those counts.
    The disparity between the numbers presented in this report and those in this research note is likely rooted in the fact that different approaches were taken in the two research efforts. Those who did the work for the research note seemed to be addressing the question, “What is the maximum possible number of backing deaths that could be occurring annually based on NCHS death certificate and FARS data?” This may have caused those working on the research note to make certain assumptions concerning the data that were used to determine the maximum possible number of backing fatalities. On the other hand, the goal of those who did the work on which this report is based was to simply count the number of backing (and other) incidents that occur in a given time period and that can be verified through various sources. There may be additional backing incidents that occurred in 1998, for example, the year that was the focus of death certificate research for this report, but only the incidents reflected in the counts presented in this report could be identified or verified.
    In addition to the different research approaches, some of the disparity may result from the fact that the data used for the research note were from 1992 and 1993 while the years covered in this report are 1998 and later.
    Data presented in the research note appear below.

Table XXXI: (from NHTSA Research Note) Annual Estimates of Nonoccupant Fatalities in Off-Road Backing Crashes – 1992-1993 Average

Age Group

# of Fatalities

% of Total

% of Population

1-4

116

30

6

All Other Ages

274

70

94

Total

390

100

100


Table XXXII: (from NHTSA Research Note) Annual Number of Nonoccupant Fatalities in On-Road Backing Crashes – 1992-1993 Average

Age Group

Number of Fatalities

% of Total

1-4

14

16

All Other Ages

71

84

Total

85

100