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Postnatal growth preceding sudden infant death syndrome
J G Brooks1, R E Gilbert, P J Flemming
1Department of Pediatrics, Dartmouth Medical School, Lebanon, New Hampshire 03756.
Insights
Postnatal growth in infants who died from sudden infant death syndrome (SIDS) showed no significant differences compared to age-matched controls. This finding suggests growth patterns are not a distinguishing factor for SIDS.
Area of Science:
- Pediatrics
- Neonatal Research
- Sudden Infant Death Syndrome (SIDS) Etiology
Background:
- Sudden Infant Death Syndrome (SIDS) remains a significant concern in infant mortality.
- Understanding factors preceding SIDS is crucial for prevention strategies.
- Postnatal growth patterns have been investigated as a potential contributing factor.
Purpose of the Study:
- To compare the postnatal growth trajectories of infants who experienced SIDS with those of age-matched controls.
- To determine if deviations in growth precede SIDS onset.
Main Methods:
- A retrospective case-control study design was employed.
- SIDS victims were matched with two controls based on interview date, postnatal age, and neighborhood.
- Data collected via parental interviews, medical records, and health visitor records included interval body weights.
Main Results:
- No statistically significant differences in postnatal growth rates were observed between SIDS victims and control infants.
- Analysis stratified by sex, gestational age, maternal smoking, feeding method, or age at death revealed no significant growth differences.
- Excluded SIDS cases did not differ from analyzed cases regarding known risk factors or demographics.
Conclusions:
- The study found no discernible difference in postnatal growth between infants who died of SIDS and their age-matched controls.
- These findings indicate that typical postnatal growth is unlikely to be a primary indicator or risk factor for SIDS.
Objective:
To compare postnatal growth preceding the sudden infant death syndrome (SIDS) with that of age matched controls.
Design:
Retrospective case-control study. Each SIDS victim was matched with two controls on date of parental interview, postnatal age, and neighborhood. Clinical and demographic data were collected by parental interview and by review of medical records, and interval body weights were obtained from health visitors' records.
Study Population:
All infants dying of SIDS between 1 May, 1987 and 30 April, 1989 in a geographically defined region consisting of four health districts in Avon and North Somerset in southwest England. Seventy-eight of the 99 SIDS victims and 139 of 156 control infants were included in the final analysis.
Results:
There was no significant difference between SIDS victims and the controls in either of the two indices of postnatal growth which were analyzed. The mean growth rates (+/- 1 SEM) between birth and the last live weight (age equivalent weight for control infants) were 27.1 +/- 1.0 g/day for the SIDS cases and 28.3 +/- 1.5 g/day for the control infants. The mean growth rate (+/- 1 SEM) between the last two live weights were 31.5 +/- 2.9 and 24.9 +/- 2.1 g/day for the SIDS and control infants, respectively. Stratification of the infants by sex, gestational age, maternal smoking during pregnancy, breast versus bottle feeding, or age at death, did not result in any significant differences between SIDS and controls in either of the indices of postnatal growth rate. The 20 SIDS cases which were excluded from the final analysis did not differ from 78 whose data was analyzed, with regard to established SIDS risk factors, age at death, or postmortem weight.
Conclusions:
No difference was found between the postnatal growth of SIDS victims and that of age matched control infants.