Characteristics of 2733 cases diagnosed with deformational plagiocephaly and changes in risk factors over time
Christy M McKinney1, Michael L Cunningham, Victoria L Holt
1School of Public Health, University of Texas-Houston, Dallas Regional Campus, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA. christy.mckinney@utsouthwestern.edu
Insights
Risk factors for infant plagiocephaly, such as being a multiple birth or having an older mother, increased after 1992. These findings suggest supine sleeping recommendations may influence plagiocephaly development.
Area of Science:
- Pediatric Health
- Craniofacial Development
- Public Health Recommendations
Background:
- Deformational plagiocephaly is a common condition in infants.
- The American Academy of Pediatrics (AAP) issued sleep-position recommendations in 1992.
- Understanding trends in plagiocephaly risk factors is crucial for public health.
Purpose of the Study:
- To characterize infant and maternal factors associated with plagiocephaly.
- To analyze temporal changes in potential plagiocephaly risk factors post-1992.
Main Methods:
- A case-only study design was employed.
- Infants diagnosed with plagiocephaly or brachycephaly between 1987-2002 were included (n=2733).
- Characteristics were compared between infants born before (1987-1990) and after (1991-2002) the AAP recommendations.
Main Results:
- Infants born 1991-2002 showed increased odds of being from multiple births (OR 3.4) and having mothers aged 35+ (OR 3.2).
- These infants had decreased odds of prolonged birth hospitalization (OR 0.02).
- Occipital flattening was present in 91.6% and brachycephaly in 17.2% of infants born 1991-2002.
Conclusions:
- Risk factors for plagiocephaly became more prevalent after the 1992 AAP sleep-position recommendations.
- Findings support the hypothesis that supine sleeping influences the relationship between risk factors and plagiocephaly.
- Further controlled studies are recommended for validation.
Objectives:
To describe infant and maternal characteristics among infants with plagiocephaly and to quantify time trends in potential risk factors for plagiocephaly.
Design:
Case-only study. We described the characteristics of individuals born between 1987 and 2002. We also compared characteristics of individuals born from 1987 through 1990, before the American Academy of Pediatrics 1992 sleep-position recommendations, with those of individuals born from 1991 to 2002.
Setting:
Children's Craniofacial Center at Children's Hospital and Regional Medical Center in Seattle, Washington.
Participants:
Subjects included 2733 infants diagnosed with deformational plagiocephaly or brachycephaly before 18 months of age who were born from 1987 to 2002.
Main Outcome Measure:
Descriptive statistics, odds ratios, and 95% confidence intervals.
Results:
Among individuals born from 1991 to 2002, 91.6% had occipital-only flattening, 17.2% were brachycephalic, 67.7% were boys, and 9.9% were multiple birth infants. As compared with individuals born from 1987 through 1990, those born from 1991 to 2002 were more apt to be a multiple birth (odds ratio [OR] 3.4, 95% confidence interval [CI]: 0.8, 14.1) and to have a mother > or =35 years of age (OR, 3.2; 95% CI, 1.4 to 7.3); they were hospitalized less commonly at birth for 4 or more days (OR, 0.02; 95% CI, 0.01 to 0.06).
Conclusions:
Several risk factors for plagiocephaly were more common among individuals born after the 1992 American Academy of Pediatrics sleep-position recommendations. These results are consistent with the explanation that supine sleeping modifies the association between such risk factors and plagiocephaly. Further studies with a control group are needed to validate this conclusion.
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