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Published on: January 29, 2018
Secular birth weight changes in liveborn infants before, during, and after 1991-1995 homeland war in Croatia
Irena Brialić1, Urelija Rodin, Javor Vrdoljak
1Pediatric outpatient clinic, Trogir, Croatia. irena.bralic@si.t-com.hr
Insights
Secular trends show improved infant birth weights in Croatia before and after the war, but a decline during the conflict. This suggests war stress negatively impacts newborn birth weights.
Area of Science:
- Public Health
- Pediatrics
- Epidemiology
Background:
- Birth weight is a critical indicator of infant health and development.
- Secular trends in birth weight can reflect population health and environmental factors.
- Understanding these trends is crucial for public health interventions.
Purpose of the Study:
- To analyze changes in liveborn infant birth weights in Croatia between 1983 and 2003.
- To compare birth weight trends across pre-war, war, and post-war periods.
Main Methods:
- Analysis of 959,591 liveborn infant records from the Croatian National Institute of Public Health.
- Categorization of infants into pre-war (1983-1989), war (1991-1995), and post-war (1996-2003) periods.
- Assessment of birth weights using 500g intervals.
Main Results:
- A significant increase in infants weighing >=3500g and a decrease in those weighing <3500g was observed over the study period.
- Positive trends were noted for very high birth weights (4000-4499g, >=4500g) and very low birth weights (500-999g).
- During the war, there was a decrease in the 2500-3499g group and an increase in the 2000-2499g group, with a significant reduction in the >=4500g category.
Conclusions:
- Infant birth weights in Croatia showed positive secular changes pre- and post-war, contrasting with negative changes during the war.
- The findings suggest a potential association between wartime stress and adverse birth weight outcomes.
- These results highlight the impact of conflict on maternal and infant health.
Aim:
To assess secular trends in birth weights of liveborn infants in Croatia from 1983 to 2003.
Methods:
Of a total of 959,591 liveborn infants in the study period, 384,367 were born in the prewar (1983-1989), 226,226 during the war (1991-1995), and 348 998 in the postwar (1996-2003) period. The birth weight of liveborn infants was assessed by 500 g weight groups on the basis of data provided by the Croatian National Institute of Public Health.
Results:
The gradual and significant increase in the share of infants with birth weight > or =3500 g (<0.001) was paralleled by a reduction in the share of infants with birth weights 2500-3449 g (P<0.001) and <2500 g (P<0.05) in the study period. There was a positive trend in the proportion of 4000-4499 g, > or =4500 g (P<0.001 for both), and 500-999 g (P=0.002) birth weight groups and negative trend in 1000-1499 g, 2500-2999 g, and 3000-3499 g weight groups (P<0.001 for all). During the war period, the proportion of liveborn infants in the 2500-3499 g weight group decreased in comparison with prewar proportion; this trend continued in the postwar period (P<0.001 for both). In the war period, the proportion of liveborn infants with birth weights of 2000-2499 g was significantly larger (P<0.001) and that of > or =4500 g significantly smaller in comparison with the prewar and postwar proportions (P<0.001 for both).
Conclusion:
Positive secular changes in infant birth weights observed in the prewar and postwar period contrasted negative changes during the war period in Croatia. This finding may suggest the association between war suffering and stress and changes in birth weights of newborns.
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