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Secular changes in rehospitalization of very low birth weight infants
Insights
Improved survival for very low birth weight (VLBW) infants is linked to higher rehospitalization rates, particularly for structural defects. This trend highlights the need for ongoing monitoring of VLBW infant health outcomes.
Area of Science:
- Neonatalogy
- Pediatric Health Outcomes
- Public Health
Background:
- Neonatal survival rates for very low birth weight (VLBW) infants (<1,500g) have significantly improved.
- Focus has shifted to the quality of life and less severe morbidities among survivors.
- Hospital readmission patterns are a key indicator of post-neonatal morbidity.
Purpose of the Study:
- To investigate the impact of increased VLBW infant survival on hospital readmission rates.
- To compare readmission patterns of VLBW survivors with those of heavier infants.
- To identify specific causes of readmission associated with VLBW.
Main Methods:
- Comparison of readmission data for VLBW infants and a control group of heavier infants.
- Analysis of readmission rates before 2 years of age across different time periods (1968-1972 vs. 1974-1978).
- Calculation of relative risk for readmission in VLBW infants.
Main Results:
- VLBW infant rehospitalization rates increased from 22% to 27% as survival improved.
- Rehospitalization rates for heavier infants decreased slightly.
- A statistically significant increase in readmission risk for structural defects (e.g., hernias) was observed in VLBW infants.
Conclusions:
- Rising VLBW survival rates correlate with increased hospital readmissions.
- Structural defects represent a growing concern for VLBW survivors.
- Despite increased readmissions, overall hospital days decreased for both groups.
Abstract:
Neonatal survival among very low birth weight infants (less than 1,500 g) has improved dramatically during the last decade. Concern about the quality of life among these survivors has focused mainly on the prevalence of severe motor, sensorineural, and intellectual impairment. This study examined the possible effects of increasing survival on less serious morbidity as evidenced by hospital readmission patterns. The experience of VLBW survivors in a geographically defined population has been compared with that of a randomly selected group of heavier infants. As VLBW infant survival rates improved from 35% to 48% between 1968 to 1972 and 1974 to 1978, the rehospitalization rate before 2 years of age increased from 22% to 27%. In contrast, among heavier infants, rehospitalization rates decreased from 9.8% to 8.9%. The relative risk of readmission associated with VLBW thus increased from 2.2 to 3.0. Although this increase in the overall relative risk of rehospitalization in VLBW infants was not statistically significant, there was a dramatic and statistically significant increase in the relative risk of being readmitted because of structural defects (particularly hernias). Overall, there was a marked decline in the number of days spent in the hospital in both birth weight groups.