신생아 후두부 탈모증의 유병율과 위험 요인에 대한 연구

Abstract

ABSTRACT

A Retrospective Study of Prevalence and Risk factors for Neonatal Occipital Alopecia

Na Chan-Ho Advisor : Prof. Choi Kyu-Chul, M.D., Ph.D. Department of Medicine, Graduate School of Chosun University

Background: For many years, the etiology of neonatal occipital alopecia (NOA) has been thought to be friction. It is recently clear that NOA is related with the physiological shedding of hair. Objective: We sought to evaluate the prevalence and risk factors for NOA. Methods: Medical records of 240 postpartum patients delivered at our institution between January 2006 and June 2007 were reviewed. Phone interviews with 193 respondents among them were conducted to investigate the actual conditions of NOA. Results: The presence of NOA was in 39 babies (20.2%). Univariate analysis showed that NOA was not associated with baby’s sleeping position, but was significantly associated with maternal parturition age, delivery method, and gestational age (P < .05). In multiple logistic regression analysis, the risk of NOA was higher in group younger than 35 years of parturition age (OR, 3.86; 95% CI, 1.08-13.82), in group not undergoing a C-section (2.47; 1.09-5.60), and in group delivered after 37 weeks gestational age (3.36; 1.22-9.26). Conclusion: The pregnancy-related factors such as non-elderly gravida, non-surgical delivery, and mature gestational age are associated with having babies’ NOA. This finding supports a theory that NOA is not an acquired alopecia but a physiological condition resulting from synchronised shedding of telogen hairs initiated in utero.