| Pediculosis by Pediculus humanus capitis is still an important health issue in school-age students worldwide. Although
pediculicidal agents effectively kill head lice, the re-infestation rate is still high. This study was conducted to provide a summary
of evidence about the prevalence of pediculosis capitis among school-age students worldwide. Different databases including
MEDLINE/PubMed, Scopus, and Web of Science were searched for publications related to pediculosis capitis in school-age
students from 1977 to 2020. All peer-reviewed original research articles describing pediculosis capitis among school-age students
were included. Statistical heterogeneity of the different years among studies was assessed using the standard chi squared and I2
tests. Due to the significant heterogeneity, a random effect model was adopted to estimate the pooled, continent, and genderspecific
prevalence of pediculosis. Two hundred and one papers met the inclusion criteria of this review and entered into the
meta-analysis including 1,218,351 individuals. Through a random effect model, the prevalence of pediculosis capitis among
school students was estimated as 19% (CI 95%= 0.18–0.20%, I2 = 99.89%). The prevalence of pediculosis capitis among boys
was 7%(CI 95%= 0.05–0.10) compared to 19%(CI 95%= 0.15–0.24) in girls. The highest prevalence was in Central and South
America (33%, CI 95%= 0.22–0.44, I2 = 99.81%) and the lowest was in Europe (5%, CI 95%= 4–6, I2 = 99.28%). Relatively
high pediculosis capitis prevalence among school-age students observed in this study emphasizes the need for implementing
screening and prophylaxis tailored to the local context. |