doi:10.3390/children7120306engPastor-Pons, IñakiLucha-López, María OrosiaBarrau-Lalmolda, MartaRodes-Pastor, IñakiRodríguez-Fernández, Ángel LuisHidalgo-García, CésarTricas-Moreno, José MiguelInterrater and intrarater reliability of cranial anthropometric measurements in infants with positional plagiocephalyART-2020-121585Background: Anthropometric measurements with calipers are used to objectify cranial asymmetry in positional plagiocephaly but there is controversy regarding the reliability of different methodologies. Purpose: To analyze the interrater and intrarater reliability of direct anthropometric measurements with caliper on defined craniofacial references in infants with positional plagiocephaly. Methods: 62 subjects (<28 weeks), with a difference of at least 5 mm between cranial diagonal diameters. Maximal cranial circumference, length and width and diagonal cranial diameters were measured. Intrarater (2 measurements) and interrater (2 raters) reliability was analyzed. Results: intra- and interrater reliability of the maximal cranial length and width and right cranial diagonal was excellent: intraclass correlation coefficient (ICC) > 0.9. Intrarater and interrater reliability for the left cranial diagonal was excellent: ICC > 0.9 and difference in agreement in the Bland-Altman plot 0.0 mm, respectively. Intrarater and interrater reliability for the maximal cranial circumference was good: differences in agreement in Bland-Altman plots: intra: −0.03 cm; inter: −0.12 cm. Conclusions: Anthropometric measurements in a sample of infants with moderate positional plagiocephaly have shown excellent intra- and interrater reliability for maximal cranial length, maximal cranial width, and right and left cranial diagonals, and good intra- and interrater reliability in maximal cranial circumference measurement.2020http://zaguan.unizar.es/record/9844510.3390/children7120306http://zaguan.unizar.es/record/98445oai:zaguan.unizar.es:98445Children 7, 12 (2020), Art. 306 [10 pp.]byhttp://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccess