Abstract
The etiology and pathogenesis of periodic fever, aphthous stomatitis, pharyngitis, and adenitis (PFAPA) syndrome are unclear. We performed a case-control study to evaluate potential environmental or lifestyle factors associated with PFAPA morbidity. We enrolled 119 patients with PFAPA syndrome who had undergone tonsillectomy in Oulu University Hospital between 1987 and 2007. We recruited 230 controls, matched for sex, birth date, and place from the database of the Population Register Center of Finland. All the patients and controls completed a questionnaire regarding exposure to environmental triggers during early childhood. Maternal smoking was more common among PFAPA syndrome patients than controls (23 vs. 14%; P = 0.005). PFAPA patients had lower breastfeeding rates than controls (94 vs. 99%; P = 0.006). No other environmental factors were associated with PFAPA syndrome, except having an aquarium at home (P = 0.007). The patient group also used natural or herbal medicines more often than the controls (P = 0.01).
Conclusion: Maternal smoking and lack of breastfeeding, known risk factors for common childhood infections, were more common in patients with PFAPA syndrome than in matched controls. Environmental factors may be important in the pathogenesis of PFAPA syndrome and should be evaluated in future studies.
What is Known: • The pathogenesis and genetics of periodic fever, aphthous stomatitis, pharyngitis, and adenitis (PFAPA) syndrome remain unsolved. • PFAPA syndrome has been shown to cluster in families. | |
What is New: • Maternal smoking and lack of breastfeeding are more common in patients with PFAPA syndrome than in the controls. • Environmental risk factors may be important in the pathogenesis of the syndrome. |
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Abbreviations
- A:
-
Adenoidectomy
- aOR:
-
Adjusted odds ratio
- CI:
-
Confidence interval
- IL:
-
Interleukin
- NA:
-
Not applicable
- OR:
-
Odds ratio
- PFAPA:
-
Periodic fever, aphthous stomatitis, pharyngitis, and adenitis syndrome
- TE:
-
Tonsillectomy
- TEA:
-
Adenotonsillectomy
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Funding
The present work was supported by Foundation for Pediatric Research and The Finnish Medical Foundation.
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KS collected the data on the controls, participated in the analyses of the data, and wrote the first draft of the manuscript. UL collected the data on the cases and revised the manuscript. PK participated in the study design and revised the manuscript. TT participated in the analyses of the data and revised the manuscript. MU participated in the study design and revised the manuscript. MR participated in the study design, performed data analyses, and supervised drafting and revising the manuscript. All authors interpreted the data, contributed to the intellectual content, reviewed the manuscript, and approved the final version of the manuscript as submitted.
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The authors declare that they have no conflict of interest.
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This study was approved by the ethical committee of Northern Osthrobothnia Hospital District. Informed consent was obtained from the subjects, guardians, or both, depending on the age of the subjects.
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Communicated by Nicole Ritz
Revisions received: 3 May 2018 / 4 May 2018
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Kettunen, S., Lantto, U., Koivunen, P. et al. Risk factors for periodic fever, aphthous stomatitis, pharyngitis, and adenitis (PFAPA) syndrome: a case-control study. Eur J Pediatr 177, 1201–1206 (2018). https://doi.org/10.1007/s00431-018-3175-1
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DOI: https://doi.org/10.1007/s00431-018-3175-1