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Article |

Incidence and Risk Factors of Fall Injuries Among Infants:  A Study in Greece FREE

Xanthi Dedoukou, MD; Themis Spyridopoulos, MD; Simon Kedikoglou, MD; Delia Marina Alexe, MD; Nick Dessypris, MSc; Eleni Petridou, MD, MPH
[+] Author Affiliations

Author Affiliations: From the Department of Hygiene and Epidemiology, Athens University Medical School, Athens, Greece (Drs Dedoukou, Spyridopoulos, Kedikoglou, Alexe, and Petridou and Mr Dessypris); and Department of Epidemiology, Harvard School of Public Health, Boston, Mass (Dr Petridou).


Arch Pediatr Adolesc Med. 2004;158(10):1002-1006. doi:10.1001/archpedi.158.10.1002.
Text Size: A A A
Published online

Objective  To assess the incidence of fall injuries among infants in Greece, overall and by type of nursery equipment.

Design  Review of data from a large injury database.

Setting  The Emergency Department Injury Surveillance System in Greece.

Patients  A total of 2672 injured infants.

Interventions  Specially trained health visitors performed in-person interviews with the children’s guardians, using a precoded questionnaire. The results of an independent survey of 777 mothers of noninjured children younger than 2 years attending the same emergency departments were used to allow quantification of the role of specific nursery equipment in the causation of infant fall injuries.

Main Outcome Measures  Annual rate of injury by falling in infants, overall and by cause.

Results  About 4400 infant fall injuries occur annually in Greece, corresponding to an annual incidence rate of 44 injuries per 1000 infants. The incidence of falls increases with increasing infant age. A high percentage of severe injuries was detected, most of them concussions (14.3%) and fractures (9.4%). Approximately 10% of infants with fall-related injuries required hospitalization. More than 36% of fall injuries involved nursery equipment. Infant walker use was associated with a higher incidence of falls (about 9 per 1000 infant-years), and these falls occasionally involved stairs and caused serious injuries. Infant bouncers, strollers, and changing tables were all associated with a similar incidence of falls (about 4 per 1000 infant-years).

Conclusions  Falls are a common cause of serious infant injuries, and nursery equipment is frequently involved in the injury-causing event.

During the past few decades, injuries have been recognized as a major cause of death and disability worldwide and as a factor responsible for a substantial morbidity among children of all ages.13 A characteristic of injuries among very young children is that aspects of their normal behavior, eg, the natural curiosity or the physiologic development of motor skills, could be associated with an increased injury risk,49 especially in a nonfriendly environment or when inappropriate nursery equipment is used. Moreover, caretakers often show insufficient consideration for the risks linked to the developmental milestones and sometimes forget that they should be prepared for unexpected behavior on the part of the infants.10 Most fall-related injuries affect children during their early stages of development, and they usually occur at home.11

Falls are one of the most common causes of injuries among infants, and they have long been studied in relation to nursery equipment. Several studies have explored the role of specific types of nursery equipment, such as infant walkers and bouncers, in the causation of fall-related injuries.5,1215 To our knowledge, however, the overall contribution of these consumer products in the etiology of infant falls has not been thoroughly investigated. The present study aimed to assess the incidence of fall-related injuries among infants in Greece, overall and by type of nursery equipment. The study was based on infant injury data retrieved from a large database that covered more than 300 000 injured persons presenting to the emergency departments of a network of collaborating hospitals.

The Center for Research and Prevention of Injuries was established by the University of Athens and the Greek Ministry of Health for the investigation and prevention of injuries in Greece. In collaboration with 4 major hospitals across the country, a large database (the Emergency Department Injury Surveillance System [EDISS]) was developed and is continuously updated. The database covers all persons who have contacted the emergency departments of the collaborating hospitals for an injury of any type at any age. Two of these hospitals are located in the greater Athens area: the first is a major teaching pediatric hospital that covers about 29% of the underlying childhood population, in which population about 9250 infants are born on average each year.16,17 The second hospital, which was not included in this analysis, is an adult trauma hospital, one of the 2 in the greater Athens area. The other 2 hospitals are the regional (district) hospitals of Magnesia and Corfu counties and have almost full coverage of the underlying populations. In these regions, about 2825 infants are born on average each year, and childhood injuries have been estimated to represent about 2.2% of those occurring in the Greek child population outside the greater Athens area.16,17

The focus of this investigation was on fall-related injuries among infants younger than 12 months who were brought for care in an emergency department. The study protocol was approved by the Ethics Committee of the University of Athens Medical School. During a 5-year period, from January 1, 1996, through December 31, 2000, 2672 infant fall-related injuries were recorded in the EDISS database. The rubrics used to retrieve and classify data were W0101 to W1999 of International Classification of Diseases, 10th Revision, of the World Health Organization coding manuals, describing the mechanism of injury. The data retrieved from EDISS have been collected by specially trained health visitors, who have interviewed in person the children’s guardians, usually mothers, on the basis of a precoded questionnaire.17 The interviews took place in the emergency departments of the collaborating hospitals along with the child’s medical examination by the attending physician. The EDISS questionnaire covers sociodemographic variables, the mechanism and the objects involved in the injury, type of injury and injured body part, supervision patterns, medical assessment of the injured child, and treatment provided. Because the health visitors who collaborate in our project are integrated into the systems of the collaborating hospitals, there have been essentially no refusals. All information is recorded in the EDISS computerized database.

To assess the frequency of use of the various types of infant nursery equipment in the underlying population, and thus derive equipment-specific incidence rates of infant fall injuries, a special survey was conducted in the spring of 2001 in the same hospitals in which injury data were collected. In this survey, mothers of 777 noninjured very young children (1 to 2 years old) who consecutively, during a 3-month period, contacted the ambulatory services of the collaborating hospitals for checkups or very minor ailments were interviewed about the frequency of use of nursery equipment throughout the infancy of their children. It is worth noting that both studies were based on the same population. The health visitors involved in EDISS performed this task with the use of precoded questionnaires covering the various types of nursery equipment. There were only 11 refusals among the 788 contacted women.

For the analysis, the injured infants were classified by age, sex, principal object involved in the event, and type of principal injury. Subsequently, we calculated the incidence of infant fall injuries by equipment per 1000 infant-years, taking into account infant-years at risk in the underlying population and frequency of use of nursery equipment as estimated in the ad hoc survey. The number of infants at risk every year in the catchment areas was 12 075 (9250 + 2825). The study period was 5 years; therefore, the total infant-years at risk was 60 375. We multiplied this figure by the proportion of users of each specified type of nursery equipment. The incidence of falls by type of equipment (per 1000 infant-years) was calculated as the ratio of each nursery equipment–related number of fall injuries to the corresponding infant-years at risk. Because of overlapping person-time at risk during the 1 year of infant life and the joint contribution of more than one type of nursery equipment to an injury, the estimated figures per single equipment add to more than the total infant fall injuries from all nursery equipment. Throughout the analysis, SAS statistical software (SAS Institute Inc, Cary, NC) was used.

Table 1 shows the distribution of 2672 infants with fall injuries, of a total 4340 infants with injuries of any type, recorded in EDISS during a 5-year period, by demographic variables, main object involved in the event, and type of principal injury. With the use of the sampling ratios calculated for the EDISS sample17 (28.9% for childhood injuries in the greater Athens area and 2.2% for childhood injuries in the rest of Greece, under the assumption that the recorded injuries are representative of those occurring in the whole of Greece), it is estimated that about 4400 infant fall injuries occur annually in Greece, corresponding to an annual incidence rate of approximately 44 injuries per 1000 infants. As far as infant age is concerned, the infant population at risk can be assumed to be equally distributed across the three 4-month age intervals. Thus, the substantial increase in the frequency of falls among all infants with increasing age was statistically highly significant (0-3 months, 12.7%; 4-7 months, 33.3%; and 8-11 months, 54.0%; P<.001 from a goodness-of-fit χ2 test with 2 df). There was also evidence of a slight excess of male infants among those with fall injuries. Among the infant fall injuries, 269 (10.1%) were sufficiently serious to require hospitalization. As expected, most of the serious injuries were concussions (14.3%) and fractures (9.4%), which required hospitalization in 17.3% and 61.7% of instances, respectively.

Table Graphic Jump LocationTable 1. Distribution of 2672 Infants With Fall Injuries Recorded in EDISS Database During a 5-Year Period (1996-2000) by Demographic Variables, Main Object Involved in Event, and Type of Principal Injury

Among the 2672 infant fall injuries, 967 (36.2%) involved nursery equipment, mostly walkers (11.5%), strollers (8.8%), and bouncers (5.7%). Changing table–related infant falls required the highest hospitalization rate among the studied nursery items (17.1%). About half of the recorded infant fall injuries (54.7%) were related to home objects other than nursery equipment, mainly furniture (37.2%) or other immobile home structures (15.9%); of those, almost 1 in 10 required hospitalization. In 244 instances (9.1%) the caregivers reported that infants slipped and fell from their arms; 1 in 5 infants who slipped and fell required hospitalization, and 36 of them had a fracture.

Table 2 shows the incidence of falls among infants by type of most frequently used nursery equipment, highlighting their involvement in the causality of these types of injuries. As indicated, in the catchment areas of the 3 study hospitals, an average of 12 075 new deliveries are recorded every year. On the basis of this number and the fraction of users of specified nursery equipment, as ascertained from the mothers of 777 noninjured infants, the incidence of falls by equipment per 1000 infant-years can be estimated. Infant walker use was associated with the highest incidence of falls, and these falls frequently involved stairs and caused nonminor injuries (among these injuries, 8% were fractures, 20% were concussions, and 26% were open wounds). Infant bouncers, strollers, and changing tables were associated with a similar incidence of falls (about 4 per 1000 infant-years).

Table Graphic Jump LocationTable 2. Estimation of Incidence of Infant Injuries Due to Falls From Nursery Equipment by Type of Equipment

Falls among infants are responsible for a substantial fraction of infant morbidity and mortality, accounting for about 6 deaths annually per 1 million infants in the United States.18 In the 15 European Union member states, infant falls account for about 4 and 8 deaths annually per 1 million infants in northern and southern member states, respectively, whereas in the 10 new member states of the European Union, the corresponding figure is 7.19

The findings of our study indicate that almost two thirds of all injuries recorded among infants in Greece were due to falls. More than one third of these falls were associated with the use of nursery equipment. Another third of infant falls were related to home furniture and equipment, which implies either inappropriate use of these objects in infant care or lapses in parental supervision.

As has been pointed out by other authors, use of nursery equipment carries a significant risk of falls during infancy.5,6,8,1215 In line with the literature, infant walkers tended to be associated with relatively high risk of an infant fall injury.6,8,20,21 Among the other objects in nursery equipment, infant bouncers, strollers, and changing tables were associated with a similar level of time-integrated risk (Table 2). However, attention should be focused on changing tables because they are generally used for shorter periods than bouncers or strollers and, thus, can be thought of as being more hazardous on an equal-time basis. It is evident that among the studied nursery items, changing table–related infant falls led more frequently to an injury that required hospitalization. This may be attributed to the fact that the changing table may be furniture height or may be placed on a piece of furniture, which may result in an infant fall from a considerable height. Cribs appear to be less risky, even though they are used for longer periods. Obviously, there are variations in both time of exposure to and risk from nursery equipment, so that our estimates are by necessity indications of average nursery equipment–related risk.

In 251 instances, the reported fall injury led to a fracture. Several studies have suggested that fractures in very young children may involve an element of physical child abuse.22,23 Whatever the true underlying reason, these ratios are comparable with those reported from other series of infant fall injuries.24

Our study pointed to the significant role of nursery equipment in fall-related injuries among infants. Parents should be aware of the potential hazards when purchasing such products and always use them according to the manufacturer’s instructions.25,26 The use of nursery items by infants should be under strict adult supervision. Leaving an infant on a changing table or other surface even for an instant without supervision may result in an injury, since infants who are left unsupervised can roll off and fall, especially if they are placed on an elevated surface.2527 If parents decide to purchase a walker for their child, notwithstanding current recommendations to the contrary, they should avoid its use on wheels, and they should restrict access to any stairs with a gate.25 Infants should always be securely fastened with a safety belt when placed in a high chair, a changing table, or any other similar equipment.2528

Advantages of this investigation are its general population coverage, large sample size, and use of a standard protocol. Moreover, the use of a comparison sample allowed the estimation of exposures in the population at risk, making it possible to calculate the nursing equipment–specific incidence rates. This comparison sample may not have been optimal, because there can be no assurance that there was strict correspondence with the population at risk. None of the children in the “exposure” sample, however, had come to the ambulatory services with an injury, all of them belonged to the same catchment population as the injured infants, and no obvious bias could be identified. As is common in injury research, we were unable to jointly examine predisposing conditions and triggering events in the causation of the infant falls. In the same context, we were unable to disentangle any hidden child abuse cases from those reported as unintentional falls. The study sample in greater Athens covers only a fraction of the total person-time at risk, but the choice of hospital relied on administrative considerations, and there is no reason to believe that important selection bias may have been introduced. Compared with North American countries, a considerably higher proportion of injured infants were hospitalized, but this is a well-known phenomenon in Greece, and it is frequently attributed to the inadequate development of primary health care in this country and the overprotective attitude of Greek society toward children.29,30

In conclusion, we were able to calculate the overall incidence and estimate the nursery equipment–specific incidence of infant falls in the population of Greece. We found that among nursery equipment, use of infant walkers and, to a lesser extent, infant bouncers, strollers, and even changing tables is associated with a nonnegligible risk of injury from infant falls. Diligent adult supervision, informed product selection, and simple environmental modifications can contribute to the reduction of fall-related injuries in infancy.

What This Study Adds

From data that can be referred to the general population, through use of proper sampling ratios, we estimated the overall incidence of infant injuries from falls to approximate 44 injuries per 1000 infant-years. Nursery equipment–related products accounted for more than one third of all fall injuries among infants, and the relative importance of various types of nursery equipment in the causation of infant fall injuries and hospitalizations in Greece was ranked.

Correspondence: Eleni Petridou, MD, MPH, Department of Hygiene and Epidemiology, Athens University Medical School, 75 Mikras Asias Str, Goudi, Athens 115 27, Greece (epetrid@med.uoa.gr).

Accepted for Publication: April 5, 2004.

Krug  EGSharma  GKLozano  R The global burden of injuries. Am J Public Health 2000;90523- 526
PubMed Link to Article
Kypri  KChalmers  DJLangley  JDWright  CS Child injury morbidity in New Zealand, 1987-1996 [letter]. J Paediatr Child Health 2001;37603
PubMed Link to Article
World Health Organization, The World Health Report, 2002. Available at:http://www.who.int/whr/2002/annex/en/Accessed October 15, 2003
American Academy of Pediatrics,Committee on Injury and Poison Prevention, Injuries associated with infant walkers. Pediatrics 2001;108790- 792
PubMed Link to Article
Mayr  JMSeebacher  USchimpl  GFiala  F Highchair accidents. Acta Paediatr 1999;88319- 322
PubMed Link to Article
Chiaviello  CTChristoph  RABond  GR Infant walker-related injuries: a prospective study of severity and incidence. Pediatrics 1994;93974- 976
PubMed
Macgregor  DM Injuries associated with falls from beds. Inj Prev 2000;6291- 292
PubMed Link to Article
Smith  GABowman  MJLuria  JWShields  BJ Babywalker-related injuries con tinue despite warning labels and public education. Pediatrics [serial online] 1997;100(2)e1.Accessed October 20, 2003
Watson  WLOzanne-Smith  J The use of child safety restraints with nursery furniture. J Paediatr Child Health 1993;29228- 232
PubMed Link to Article
Tarantino  CADowd  MDMurdock  TC Short vertical falls in infants. Pediatr Emerg Care 1999;155- 8
PubMed Link to Article
Mathers  LJWeiss  HB Incidence and characteristics of fall-related emergency department visits. Acad Emerg Med 1998;51064- 1070
PubMed Link to Article
Powell  ECJovtis  ETanz  RR Incidence and description of high chair–related injuries to children. Ambul Pediatr 2002;2276- 278
PubMed Link to Article
Emanuelson  I How safe are childcare products, toys and playground equipment? a Swedish analysis of mild brain injuries at home and during leisure time 1998-1999. Inj Control Saf Promot 2003;10139- 144
PubMed Link to Article
Wickham  TAbrahamson  E Head injuries in infants: the risks of bouncy chairs and car seats. Arch Dis Child 2002;86168- 169
PubMed Link to Article
Ridenour  MV Ages of young children who fall down stairs. Percept Mot Skills 1999;88669- 675
PubMed Link to Article
National Statistical Service of Greece, Distribution of parents, during 1998, by age, educational level, and place of residence. Natural Movement of the Population of Greece Athens National Statistical Service of Greece1998;129- 134
Dessypris  NPetridou  ESkalkidis  YMoustaki  MKoutselinis  ATrichopoulos  D Countrywide estimation of the burden of injuries in Greece: a limited resources approach. J Cancer Epidemiol Prev 2002;7123- 129
PubMed
National Center for Injury Prevention and Control, Unintentional fall deaths and rates per 100,000: United States, 2001. Available at:http://webappa.cdc.gov/sasweb/ncipc/mortrate10_sy.htmlAccessed October 15, 2003
 WHO Statistical Information System (WHOSIS). Available at:http://www3.who.int/whosis/menu.cfmAccessed October 5, 2003
Shendut  IHTan  KKRivara  F Baby walker associated scalding injuries seen at University Hospital Kuala Lumpur. Med J Malaysia 1995;50192- 193
PubMed
Petridou  ESimou  ESkondras  CPistevos  GLagos  PPapoutsakis  G Hazards of baby walkers in a European context. Inj Prev 1996;2118- 120
PubMed Link to Article
Thomas  SARosenfield  NSLeventhal  JMMarkowitz  RI Long-bone fractures in young children: distinguishing accidental injuries from child abuse. Pediatrics 1991;88471- 476
PubMed
Dalton  HJSlovis  THelfer  REComstock  JScheurer  SRiolo  S Undiagnosed abuse in children younger than 3 years with femoral fracture. AJDC 1990;144875- 878
PubMed
Trogan  IDessypris  NMoustaki  MPetridou  E How common is abuse in Greece? studying cases with femoral fractures. Arch Dis Child 2001;85289- 292
PubMed Link to Article
 Fall prevention—children. Available at:http://www.tvfr.com/CS/ip/Falls/fallprev_children.htmlAccessed March 10, 2004
 Fall prevention for infants and young children. Available at:http://www.health.state.ok.us/PROGRAM/injury/factsheets/fall_prevention_for_children.htmAccessed March 10, 2004
Conners  GPVeenema  TGKavanagh  CARicci  JCallahan  CM Still falling: a community-wide infant walker injury prevention initiative. Patient Educ Couns 2002;46169- 173
PubMed Link to Article
Watson  WLOzanne-Smith  J The use of child safety restraints with nursery furniture. J Paediatr Child Health 1993;29228- 232
PubMed Link to Article
 Ten leading causes of hospitalization by age group, Minnesota, 2001. Available at:http://www.health.state.mn.us/injury/pub/ed2001/ed01appena7.pdfAccessed March 10, 2004
 Leading causes of death and hospitalization in Canada. Available at:http://www.hc-sc.gc.ca/pphb-dgspsp/publicat/lcd-pcd97/hsp_mf_e.html#per)Accessed March 10, 2004

Figures

Tables

Table Graphic Jump LocationTable 1. Distribution of 2672 Infants With Fall Injuries Recorded in EDISS Database During a 5-Year Period (1996-2000) by Demographic Variables, Main Object Involved in Event, and Type of Principal Injury
Table Graphic Jump LocationTable 2. Estimation of Incidence of Infant Injuries Due to Falls From Nursery Equipment by Type of Equipment

References

Krug  EGSharma  GKLozano  R The global burden of injuries. Am J Public Health 2000;90523- 526
PubMed Link to Article
Kypri  KChalmers  DJLangley  JDWright  CS Child injury morbidity in New Zealand, 1987-1996 [letter]. J Paediatr Child Health 2001;37603
PubMed Link to Article
World Health Organization, The World Health Report, 2002. Available at:http://www.who.int/whr/2002/annex/en/Accessed October 15, 2003
American Academy of Pediatrics,Committee on Injury and Poison Prevention, Injuries associated with infant walkers. Pediatrics 2001;108790- 792
PubMed Link to Article
Mayr  JMSeebacher  USchimpl  GFiala  F Highchair accidents. Acta Paediatr 1999;88319- 322
PubMed Link to Article
Chiaviello  CTChristoph  RABond  GR Infant walker-related injuries: a prospective study of severity and incidence. Pediatrics 1994;93974- 976
PubMed
Macgregor  DM Injuries associated with falls from beds. Inj Prev 2000;6291- 292
PubMed Link to Article
Smith  GABowman  MJLuria  JWShields  BJ Babywalker-related injuries con tinue despite warning labels and public education. Pediatrics [serial online] 1997;100(2)e1.Accessed October 20, 2003
Watson  WLOzanne-Smith  J The use of child safety restraints with nursery furniture. J Paediatr Child Health 1993;29228- 232
PubMed Link to Article
Tarantino  CADowd  MDMurdock  TC Short vertical falls in infants. Pediatr Emerg Care 1999;155- 8
PubMed Link to Article
Mathers  LJWeiss  HB Incidence and characteristics of fall-related emergency department visits. Acad Emerg Med 1998;51064- 1070
PubMed Link to Article
Powell  ECJovtis  ETanz  RR Incidence and description of high chair–related injuries to children. Ambul Pediatr 2002;2276- 278
PubMed Link to Article
Emanuelson  I How safe are childcare products, toys and playground equipment? a Swedish analysis of mild brain injuries at home and during leisure time 1998-1999. Inj Control Saf Promot 2003;10139- 144
PubMed Link to Article
Wickham  TAbrahamson  E Head injuries in infants: the risks of bouncy chairs and car seats. Arch Dis Child 2002;86168- 169
PubMed Link to Article
Ridenour  MV Ages of young children who fall down stairs. Percept Mot Skills 1999;88669- 675
PubMed Link to Article
National Statistical Service of Greece, Distribution of parents, during 1998, by age, educational level, and place of residence. Natural Movement of the Population of Greece Athens National Statistical Service of Greece1998;129- 134
Dessypris  NPetridou  ESkalkidis  YMoustaki  MKoutselinis  ATrichopoulos  D Countrywide estimation of the burden of injuries in Greece: a limited resources approach. J Cancer Epidemiol Prev 2002;7123- 129
PubMed
National Center for Injury Prevention and Control, Unintentional fall deaths and rates per 100,000: United States, 2001. Available at:http://webappa.cdc.gov/sasweb/ncipc/mortrate10_sy.htmlAccessed October 15, 2003
 WHO Statistical Information System (WHOSIS). Available at:http://www3.who.int/whosis/menu.cfmAccessed October 5, 2003
Shendut  IHTan  KKRivara  F Baby walker associated scalding injuries seen at University Hospital Kuala Lumpur. Med J Malaysia 1995;50192- 193
PubMed
Petridou  ESimou  ESkondras  CPistevos  GLagos  PPapoutsakis  G Hazards of baby walkers in a European context. Inj Prev 1996;2118- 120
PubMed Link to Article
Thomas  SARosenfield  NSLeventhal  JMMarkowitz  RI Long-bone fractures in young children: distinguishing accidental injuries from child abuse. Pediatrics 1991;88471- 476
PubMed
Dalton  HJSlovis  THelfer  REComstock  JScheurer  SRiolo  S Undiagnosed abuse in children younger than 3 years with femoral fracture. AJDC 1990;144875- 878
PubMed
Trogan  IDessypris  NMoustaki  MPetridou  E How common is abuse in Greece? studying cases with femoral fractures. Arch Dis Child 2001;85289- 292
PubMed Link to Article
 Fall prevention—children. Available at:http://www.tvfr.com/CS/ip/Falls/fallprev_children.htmlAccessed March 10, 2004
 Fall prevention for infants and young children. Available at:http://www.health.state.ok.us/PROGRAM/injury/factsheets/fall_prevention_for_children.htmAccessed March 10, 2004
Conners  GPVeenema  TGKavanagh  CARicci  JCallahan  CM Still falling: a community-wide infant walker injury prevention initiative. Patient Educ Couns 2002;46169- 173
PubMed Link to Article
Watson  WLOzanne-Smith  J The use of child safety restraints with nursery furniture. J Paediatr Child Health 1993;29228- 232
PubMed Link to Article
 Ten leading causes of hospitalization by age group, Minnesota, 2001. Available at:http://www.health.state.mn.us/injury/pub/ed2001/ed01appena7.pdfAccessed March 10, 2004
 Leading causes of death and hospitalization in Canada. Available at:http://www.hc-sc.gc.ca/pphb-dgspsp/publicat/lcd-pcd97/hsp_mf_e.html#per)Accessed March 10, 2004

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