We first compared the leading causes of fatal injury in children for each city. We then calculated the age-adjusted rates and population attributable risks (PARs), by sex, population group and city, for each of the top five causes of fatal injury for all cities combined. The PAR was calculated by subtracting the incidence in the unexposed (Iu) from the incidence in the total population, exposed and unexposed (Ip), and dividing the result by the incidence in the total population:
PAR = (Ip − I u)/IpThis allowed us to assess the percentage reduction in fatal injuries that could be achieved among children aged 0–14 if all groups had the same exposure level as the group at lowest risk.13 In other words, they represent how many lives could be saved if approaches were found to reduce the safety divide.
The study was approved by the Ethics Committee of the Medical Research Council of South Africa.
Results
Approximately two-thirds of all children died from one of the top five causes of fatal injury (Fig. 1). Pedestrian injuries, drowning and burns ranked among the top three causes of death in all cities except Cape Town, where firearm-related deaths outnumbered those due to drowning. For Tshwane and Buffalo City, drowning deaths led, accounting for approximately one in four cases. For the other four cities, pedestrian deaths were most common. Firearm-related deaths were leading causes in Tshwane and Cape Town only, ranking fourth and third respectively. In the other cities, road traffic injuries with an unspecified road user (i.e. with no indication of whether the victim was a pedestrian, passenger or driver) contributed between 8.7% and 13.3% of fatally injured cases. In Buffalo City, sharp objects were among the top five leading causes of childhood fatal injuries (14.4% of cases)...
...
Conclusion
- WHO
Fatal injuries among urban children in South Africa: risk distribution and potential for reduction
Stephanie Burrows, Ashley van Niekerk & Lucie Laflamme
Volume 88, Number 4, April 2010, 267-272
Table 2. Number of events,a age-adjusted death ratesb and population attributable risksc for leading causes of fatal injury in children by sex, population group and city, South Africa, 2001–2003
Pedestrian | Passenger | Drowning | Burn | Firearm | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
No. | Rate | No. | Rate | No. | Rate | No. | Rate | No. | Rate | |||||
Sex | ||||||||||||||
Female | 300 | 6.1 | 86 | 1.7 | 108 | 2.1 | 153 | 3.0 | 63 | 1.3 | ||||
Male | 453 | 9.2 | 99 | 2.0 | 265 | 5.3 | 206 | 4.1 | 109 | 2.2 | ||||
Population groupd | ||||||||||||||
Indian/Asian | 9 | 1.5 | 9 | 1.5 | 5 | 0.9 | 7 | 1.2 | 6 | 1.0 | ||||
White | 8 | 0.7 | 26 | 2.4 | 12 | 4.3 | 3 | 0.3 | 12 | 1.1 | ||||
Coloured | 138 | 7.9 | 38 | 2.1 | 35 | 2.0 | 47 | 2.7 | 34 | 1.9 | ||||
African | 600 | 9.4 | 111 | 1.7 | 281 | 4.3 | 305 | 4.5 | 121 | 1.9 | ||||
City | ||||||||||||||
Tshwane | 37 | 2.5 | 12 | 0.8 | 43 | 2.9 | 27 | 1.8 | 14 | 1.0 | ||||
Cape Town | 204 | 8.8 | 42 | 1.8 | 52 | 2.2 | 85 | 3.6 | 55 | 2.4 | ||||
Johannesburg | 153 | 7.0 | 51 | 2.3 | 100 | 4.2 | 95 | 4.0 | 44 | 2.0 | ||||
eThekwini | 240 | 9.4 | 43 | 1.7 | 99 | 3.8 | 89 | 3.4 | 32 | 1.3 | ||||
Nelson Mandela | 78 | 10.0 | 26 | 3.1 | 29 | 3.7 | 36 | 4.6 | 12 | 1.5 | ||||
Buffalo City | 48 | 8.4 | 14 | 2.4 | 52 | 9.2 | 31 | 5.4 | 16 | 2.8 | ||||
PAR | ||||||||||||||
Sex | NA | 20.5 | NA | 7.2 | NA | 42.2 | NA | 15.0 | NA | 26.9 | ||||
Population group | NA | 90.4 | NA | 16.9 | NA | 39.5 | NA | 47.5 | NA | 30.9 | ||||
City | NA | 67.0 | NA | 56.3 | NA | 40.6 | NA | 49.6 | NA | 45.1 |
NA, not applicable; PAR, population attributable risk.
a Total numbers may vary across variables because of missing data for sex and population group.
b Per 100 000.
c PARs (shown as percentages) are calculated using the group with the lowest rate as the reference, i.e. females for all causes; Indian/Asian children for passenger, drowning and firearm-related deaths; white children for pedestrian and burn deaths; Tshwane for pedestrian, passenger, burn and firearm deaths; Cape Town for drowning deaths. The formula used to calculate PARs was (Ip − I u)/Ip , where Iu is the incidence in the unexposed and Ip the incidence in the total population (exposed and unexposed).
d Classification by population group as used by the South African government. Data source: National Injury Mortality Surveillance System, 2001–2003.
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